Commit | Line | Data |
---|---|---|
b97bf3fd PL |
1 | /* |
2 | * net/tipc/bearer.c: TIPC bearer code | |
c4307285 | 3 | * |
35c55c98 | 4 | * Copyright (c) 1996-2006, 2013-2016, Ericsson AB |
e4d050cb | 5 | * Copyright (c) 2004-2006, 2010-2013, Wind River Systems |
b97bf3fd PL |
6 | * All rights reserved. |
7 | * | |
9ea1fd3c | 8 | * Redistribution and use in source and binary forms, with or without |
b97bf3fd PL |
9 | * modification, are permitted provided that the following conditions are met: |
10 | * | |
9ea1fd3c PL |
11 | * 1. Redistributions of source code must retain the above copyright |
12 | * notice, this list of conditions and the following disclaimer. | |
13 | * 2. Redistributions in binary form must reproduce the above copyright | |
14 | * notice, this list of conditions and the following disclaimer in the | |
15 | * documentation and/or other materials provided with the distribution. | |
16 | * 3. Neither the names of the copyright holders nor the names of its | |
17 | * contributors may be used to endorse or promote products derived from | |
18 | * this software without specific prior written permission. | |
b97bf3fd | 19 | * |
9ea1fd3c PL |
20 | * Alternatively, this software may be distributed under the terms of the |
21 | * GNU General Public License ("GPL") version 2 as published by the Free | |
22 | * Software Foundation. | |
23 | * | |
24 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" | |
25 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
26 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
27 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE | |
28 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
29 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
30 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | |
31 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | |
32 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
33 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
b97bf3fd PL |
34 | * POSSIBILITY OF SUCH DAMAGE. |
35 | */ | |
36 | ||
7f9f95d9 | 37 | #include <net/sock.h> |
b97bf3fd | 38 | #include "core.h" |
b97bf3fd | 39 | #include "bearer.h" |
0655f6a8 | 40 | #include "link.h" |
b97bf3fd | 41 | #include "discover.h" |
35c55c98 | 42 | #include "monitor.h" |
1da46568 | 43 | #include "bcast.h" |
49cc66ea | 44 | #include "netlink.h" |
ef20cd4d | 45 | #include "udp_media.h" |
cf5f55f7 | 46 | #include "trace.h" |
fc1b6d6d | 47 | #include "crypto.h" |
b97bf3fd | 48 | |
a29a194a | 49 | #define MAX_ADDR_STR 60 |
b97bf3fd | 50 | |
ef72a7e0 | 51 | static struct tipc_media * const media_info_array[] = { |
5702dbab JPM |
52 | ð_media_info, |
53 | #ifdef CONFIG_TIPC_MEDIA_IB | |
54 | &ib_media_info, | |
d0f91938 EH |
55 | #endif |
56 | #ifdef CONFIG_TIPC_MEDIA_UDP | |
57 | &udp_media_info, | |
5702dbab JPM |
58 | #endif |
59 | NULL | |
60 | }; | |
b97bf3fd | 61 | |
0d051bf9 JPM |
62 | static struct tipc_bearer *bearer_get(struct net *net, int bearer_id) |
63 | { | |
64 | struct tipc_net *tn = tipc_net(net); | |
65 | ||
30a4616c | 66 | return rcu_dereference(tn->bearer_list[bearer_id]); |
0d051bf9 JPM |
67 | } |
68 | ||
1a90632d | 69 | static void bearer_disable(struct net *net, struct tipc_bearer *b); |
d55c60eb PB |
70 | static int tipc_l2_rcv_msg(struct sk_buff *skb, struct net_device *dev, |
71 | struct packet_type *pt, struct net_device *orig_dev); | |
3a777ff8 | 72 | |
b97bf3fd | 73 | /** |
5c216e1d | 74 | * tipc_media_find - locates specified media object by name |
ec6a1649 | 75 | * @name: name to locate |
b97bf3fd | 76 | */ |
358a0d1c | 77 | struct tipc_media *tipc_media_find(const char *name) |
b97bf3fd | 78 | { |
b97bf3fd PL |
79 | u32 i; |
80 | ||
ef72a7e0 JPM |
81 | for (i = 0; media_info_array[i] != NULL; i++) { |
82 | if (!strcmp(media_info_array[i]->name, name)) | |
5702dbab | 83 | break; |
b97bf3fd | 84 | } |
ef72a7e0 | 85 | return media_info_array[i]; |
b97bf3fd PL |
86 | } |
87 | ||
c79be454 AS |
88 | /** |
89 | * media_find_id - locates specified media object by type identifier | |
ec6a1649 | 90 | * @type: type identifier to locate |
c79be454 | 91 | */ |
358a0d1c | 92 | static struct tipc_media *media_find_id(u8 type) |
c79be454 AS |
93 | { |
94 | u32 i; | |
95 | ||
ef72a7e0 JPM |
96 | for (i = 0; media_info_array[i] != NULL; i++) { |
97 | if (media_info_array[i]->type_id == type) | |
5702dbab | 98 | break; |
c79be454 | 99 | } |
ef72a7e0 | 100 | return media_info_array[i]; |
b97bf3fd PL |
101 | } |
102 | ||
103 | /** | |
4323add6 | 104 | * tipc_media_addr_printf - record media address in print buffer |
ec6a1649 RD |
105 | * @buf: output buffer |
106 | * @len: output buffer size remaining | |
107 | * @a: input media address | |
b97bf3fd | 108 | */ |
b4b9771b | 109 | int tipc_media_addr_printf(char *buf, int len, struct tipc_media_addr *a) |
b97bf3fd | 110 | { |
c61b666e | 111 | char addr_str[MAX_ADDR_STR]; |
1a90632d | 112 | struct tipc_media *m; |
dc1aed37 | 113 | int ret; |
b97bf3fd | 114 | |
1a90632d | 115 | m = media_find_id(a->media_id); |
b97bf3fd | 116 | |
1a90632d JPM |
117 | if (m && !m->addr2str(a, addr_str, sizeof(addr_str))) |
118 | ret = scnprintf(buf, len, "%s(%s)", m->name, addr_str); | |
c61b666e | 119 | else { |
c61b666e | 120 | u32 i; |
b97bf3fd | 121 | |
941787b8 | 122 | ret = scnprintf(buf, len, "UNKNOWN(%u)", a->media_id); |
3d749a6a | 123 | for (i = 0; i < sizeof(a->value); i++) |
b4b9771b TL |
124 | ret += scnprintf(buf + ret, len - ret, |
125 | "-%x", a->value[i]); | |
b97bf3fd | 126 | } |
b4b9771b | 127 | return ret; |
b97bf3fd PL |
128 | } |
129 | ||
b97bf3fd PL |
130 | /** |
131 | * bearer_name_validate - validate & (optionally) deconstruct bearer name | |
2c53040f BH |
132 | * @name: ptr to bearer name string |
133 | * @name_parts: ptr to area for bearer name components (or NULL if not needed) | |
c4307285 | 134 | * |
637b77fd | 135 | * Return: 1 if bearer name is valid, otherwise 0. |
b97bf3fd | 136 | */ |
c4307285 | 137 | static int bearer_name_validate(const char *name, |
f19765f4 | 138 | struct tipc_bearer_names *name_parts) |
b97bf3fd PL |
139 | { |
140 | char name_copy[TIPC_MAX_BEARER_NAME]; | |
141 | char *media_name; | |
142 | char *if_name; | |
143 | u32 media_len; | |
144 | u32 if_len; | |
145 | ||
146 | /* copy bearer name & ensure length is OK */ | |
2f51e575 | 147 | if (strscpy(name_copy, name, TIPC_MAX_BEARER_NAME) < 0) |
b97bf3fd PL |
148 | return 0; |
149 | ||
150 | /* ensure all component parts of bearer name are present */ | |
b97bf3fd | 151 | media_name = name_copy; |
2db9983a AS |
152 | if_name = strchr(media_name, ':'); |
153 | if (if_name == NULL) | |
b97bf3fd PL |
154 | return 0; |
155 | *(if_name++) = 0; | |
156 | media_len = if_name - media_name; | |
157 | if_len = strlen(if_name) + 1; | |
158 | ||
159 | /* validate component parts of bearer name */ | |
c4307285 | 160 | if ((media_len <= 1) || (media_len > TIPC_MAX_MEDIA_NAME) || |
fc073938 | 161 | (if_len <= 1) || (if_len > TIPC_MAX_IF_NAME)) |
b97bf3fd PL |
162 | return 0; |
163 | ||
164 | /* return bearer name components, if necessary */ | |
b97bf3fd PL |
165 | if (name_parts) { |
166 | strcpy(name_parts->media_name, media_name); | |
167 | strcpy(name_parts->if_name, if_name); | |
168 | } | |
169 | return 1; | |
170 | } | |
171 | ||
172 | /** | |
5c216e1d | 173 | * tipc_bearer_find - locates bearer object with matching bearer name |
ec6a1649 RD |
174 | * @net: the applicable net namespace |
175 | * @name: bearer name to locate | |
b97bf3fd | 176 | */ |
7f9f95d9 | 177 | struct tipc_bearer *tipc_bearer_find(struct net *net, const char *name) |
b97bf3fd | 178 | { |
ae28ea5c | 179 | struct tipc_net *tn = tipc_net(net); |
1a90632d | 180 | struct tipc_bearer *b; |
b97bf3fd PL |
181 | u32 i; |
182 | ||
3874ccbb | 183 | for (i = 0; i < MAX_BEARERS; i++) { |
1a90632d JPM |
184 | b = rtnl_dereference(tn->bearer_list[i]); |
185 | if (b && (!strcmp(b->name, name))) | |
186 | return b; | |
b97bf3fd | 187 | } |
1fc54d8f | 188 | return NULL; |
b97bf3fd PL |
189 | } |
190 | ||
ff0d3e78 PB |
191 | /* tipc_bearer_get_name - get the bearer name from its id. |
192 | * @net: network namespace | |
193 | * @name: a pointer to the buffer where the name will be stored. | |
194 | * @bearer_id: the id to get the name from. | |
195 | */ | |
196 | int tipc_bearer_get_name(struct net *net, char *name, u32 bearer_id) | |
197 | { | |
198 | struct tipc_net *tn = tipc_net(net); | |
199 | struct tipc_bearer *b; | |
200 | ||
201 | if (bearer_id >= MAX_BEARERS) | |
202 | return -EINVAL; | |
203 | ||
204 | b = rtnl_dereference(tn->bearer_list[bearer_id]); | |
205 | if (!b) | |
206 | return -EINVAL; | |
207 | ||
208 | strcpy(name, b->name); | |
209 | return 0; | |
210 | } | |
211 | ||
7f9f95d9 | 212 | void tipc_bearer_add_dest(struct net *net, u32 bearer_id, u32 dest) |
b97bf3fd | 213 | { |
1a90632d | 214 | struct tipc_bearer *b; |
7a2f7d18 YX |
215 | |
216 | rcu_read_lock(); | |
ae28ea5c | 217 | b = bearer_get(net, bearer_id); |
1a90632d | 218 | if (b) |
b39e465e | 219 | tipc_disc_add_dest(b->disc); |
7a2f7d18 | 220 | rcu_read_unlock(); |
b97bf3fd PL |
221 | } |
222 | ||
7f9f95d9 | 223 | void tipc_bearer_remove_dest(struct net *net, u32 bearer_id, u32 dest) |
b97bf3fd | 224 | { |
1a90632d | 225 | struct tipc_bearer *b; |
7a2f7d18 YX |
226 | |
227 | rcu_read_lock(); | |
ae28ea5c | 228 | b = bearer_get(net, bearer_id); |
1a90632d | 229 | if (b) |
b39e465e | 230 | tipc_disc_remove_dest(b->disc); |
7a2f7d18 | 231 | rcu_read_unlock(); |
b97bf3fd PL |
232 | } |
233 | ||
b97bf3fd PL |
234 | /** |
235 | * tipc_enable_bearer - enable bearer with the given name | |
ec6a1649 RD |
236 | * @net: the applicable net namespace |
237 | * @name: bearer name to enable | |
238 | * @disc_domain: bearer domain | |
239 | * @prio: bearer priority | |
240 | * @attr: nlattr array | |
bc556d3e | 241 | * @extack: netlink extended ack |
c4307285 | 242 | */ |
9ab15465 | 243 | static int tipc_enable_bearer(struct net *net, const char *name, |
cb30a633 | 244 | u32 disc_domain, u32 prio, |
b83e214b HL |
245 | struct nlattr *attr[], |
246 | struct netlink_ext_ack *extack) | |
b97bf3fd | 247 | { |
cb30a633 JM |
248 | struct tipc_net *tn = tipc_net(net); |
249 | struct tipc_bearer_names b_names; | |
cb30a633 | 250 | int with_this_prio = 1; |
1a90632d JPM |
251 | struct tipc_bearer *b; |
252 | struct tipc_media *m; | |
4e801fa1 | 253 | struct sk_buff *skb; |
cb30a633 | 254 | int bearer_id = 0; |
b97bf3fd | 255 | int res = -EINVAL; |
cb30a633 | 256 | char *errstr = ""; |
f20a46c3 | 257 | u32 i; |
b97bf3fd | 258 | |
f19765f4 | 259 | if (!bearer_name_validate(name, &b_names)) { |
b83e214b | 260 | NL_SET_ERR_MSG(extack, "Illegal name"); |
7f36f798 | 261 | return res; |
a10bd924 | 262 | } |
cb30a633 | 263 | |
cb30a633 JM |
264 | if (prio > TIPC_MAX_LINK_PRI && prio != TIPC_MEDIA_LINK_PRI) { |
265 | errstr = "illegal priority"; | |
b83e214b | 266 | NL_SET_ERR_MSG(extack, "Illegal priority"); |
cb30a633 | 267 | goto rejected; |
a10bd924 | 268 | } |
b97bf3fd | 269 | |
1a90632d JPM |
270 | m = tipc_media_find(b_names.media_name); |
271 | if (!m) { | |
cb30a633 | 272 | errstr = "media not registered"; |
b83e214b | 273 | NL_SET_ERR_MSG(extack, "Media not registered"); |
cb30a633 | 274 | goto rejected; |
b97bf3fd | 275 | } |
16cb4b33 | 276 | |
cb30a633 JM |
277 | if (prio == TIPC_MEDIA_LINK_PRI) |
278 | prio = m->priority; | |
b97bf3fd | 279 | |
cb30a633 | 280 | /* Check new bearer vs existing ones and find free bearer id if any */ |
f20a46c3 HL |
281 | bearer_id = MAX_BEARERS; |
282 | i = MAX_BEARERS; | |
283 | while (i-- != 0) { | |
284 | b = rtnl_dereference(tn->bearer_list[i]); | |
285 | if (!b) { | |
286 | bearer_id = i; | |
287 | continue; | |
288 | } | |
1a90632d | 289 | if (!strcmp(name, b->name)) { |
cb30a633 | 290 | errstr = "already enabled"; |
b83e214b | 291 | NL_SET_ERR_MSG(extack, "Already enabled"); |
cb30a633 | 292 | goto rejected; |
b97bf3fd | 293 | } |
f20a46c3 HL |
294 | |
295 | if (b->priority == prio && | |
296 | (++with_this_prio > 2)) { | |
297 | pr_warn("Bearer <%s>: already 2 bearers with priority %u\n", | |
298 | name, prio); | |
299 | ||
300 | if (prio == TIPC_MIN_LINK_PRI) { | |
301 | errstr = "cannot adjust to lower"; | |
302 | NL_SET_ERR_MSG(extack, "Cannot adjust to lower"); | |
303 | goto rejected; | |
304 | } | |
305 | ||
306 | pr_warn("Bearer <%s>: trying with adjusted priority\n", | |
307 | name); | |
308 | prio--; | |
309 | bearer_id = MAX_BEARERS; | |
310 | i = MAX_BEARERS; | |
311 | with_this_prio = 1; | |
b97bf3fd PL |
312 | } |
313 | } | |
cb30a633 | 314 | |
b97bf3fd | 315 | if (bearer_id >= MAX_BEARERS) { |
cb30a633 | 316 | errstr = "max 3 bearers permitted"; |
b83e214b | 317 | NL_SET_ERR_MSG(extack, "Max 3 bearers permitted"); |
cb30a633 | 318 | goto rejected; |
b97bf3fd PL |
319 | } |
320 | ||
1a90632d JPM |
321 | b = kzalloc(sizeof(*b), GFP_ATOMIC); |
322 | if (!b) | |
7216cd94 YX |
323 | return -ENOMEM; |
324 | ||
1a90632d JPM |
325 | strcpy(b->name, name); |
326 | b->media = m; | |
327 | res = m->enable_media(net, b, attr); | |
b97bf3fd | 328 | if (res) { |
19142551 | 329 | kfree(b); |
cb30a633 | 330 | errstr = "failed to enable media"; |
b83e214b | 331 | NL_SET_ERR_MSG(extack, "Failed to enable media"); |
cb30a633 | 332 | goto rejected; |
b97bf3fd PL |
333 | } |
334 | ||
1a90632d JPM |
335 | b->identity = bearer_id; |
336 | b->tolerance = m->tolerance; | |
16ad3f40 JM |
337 | b->min_win = m->min_win; |
338 | b->max_win = m->max_win; | |
1a90632d JPM |
339 | b->domain = disc_domain; |
340 | b->net_plane = bearer_id + 'A'; | |
cb30a633 | 341 | b->priority = prio; |
2a7ee696 | 342 | refcount_set(&b->refcnt, 1); |
3a777ff8 | 343 | |
4e801fa1 | 344 | res = tipc_disc_create(net, b, &b->bcast_addr, &skb); |
3a777ff8 | 345 | if (res) { |
1a90632d | 346 | bearer_disable(net, b); |
cb30a633 | 347 | errstr = "failed to create discoverer"; |
b83e214b | 348 | NL_SET_ERR_MSG(extack, "Failed to create discoverer"); |
cb30a633 | 349 | goto rejected; |
3a777ff8 | 350 | } |
3874ccbb | 351 | |
be4977b8 | 352 | /* Create monitoring data before accepting activate messages */ |
19142551 TR |
353 | if (tipc_mon_create(net, bearer_id)) { |
354 | bearer_disable(net, b); | |
be4977b8 | 355 | kfree_skb(skb); |
35c55c98 | 356 | return -ENOMEM; |
19142551 | 357 | } |
35c55c98 | 358 | |
be4977b8 TN |
359 | test_and_set_bit_lock(0, &b->up); |
360 | rcu_assign_pointer(tn->bearer_list[bearer_id], b); | |
361 | if (skb) | |
362 | tipc_bearer_xmit_skb(net, bearer_id, skb, &b->bcast_addr); | |
363 | ||
20263641 JM |
364 | pr_info("Enabled bearer <%s>, priority %u\n", name, prio); |
365 | ||
cb30a633 JM |
366 | return res; |
367 | rejected: | |
20263641 | 368 | pr_warn("Enabling of bearer <%s> rejected, %s\n", name, errstr); |
b97bf3fd PL |
369 | return res; |
370 | } | |
371 | ||
372 | /** | |
512137ee | 373 | * tipc_reset_bearer - Reset all links established over this bearer |
ec6a1649 RD |
374 | * @net: the applicable net namespace |
375 | * @b: the target bearer | |
b97bf3fd | 376 | */ |
1a90632d | 377 | static int tipc_reset_bearer(struct net *net, struct tipc_bearer *b) |
b97bf3fd | 378 | { |
1a90632d JPM |
379 | pr_info("Resetting bearer <%s>\n", b->name); |
380 | tipc_node_delete_links(net, b->identity); | |
381 | tipc_disc_reset(net, b); | |
0e35fd5e | 382 | return 0; |
b97bf3fd PL |
383 | } |
384 | ||
2a7ee696 TL |
385 | bool tipc_bearer_hold(struct tipc_bearer *b) |
386 | { | |
387 | return (b && refcount_inc_not_zero(&b->refcnt)); | |
388 | } | |
389 | ||
390 | void tipc_bearer_put(struct tipc_bearer *b) | |
391 | { | |
392 | if (b && refcount_dec_and_test(&b->refcnt)) | |
393 | kfree_rcu(b, rcu); | |
394 | } | |
395 | ||
b97bf3fd | 396 | /** |
ec6a1649 RD |
397 | * bearer_disable - disable this bearer |
398 | * @net: the applicable net namespace | |
399 | * @b: the bearer to disable | |
c4307285 | 400 | * |
7216cd94 | 401 | * Note: This routine assumes caller holds RTNL lock. |
b97bf3fd | 402 | */ |
1a90632d | 403 | static void bearer_disable(struct net *net, struct tipc_bearer *b) |
b97bf3fd | 404 | { |
5b7066c3 JPM |
405 | struct tipc_net *tn = tipc_net(net); |
406 | int bearer_id = b->identity; | |
3874ccbb | 407 | |
1a90632d | 408 | pr_info("Disabling bearer <%s>\n", b->name); |
0d051bf9 | 409 | clear_bit_unlock(0, &b->up); |
5b7066c3 | 410 | tipc_node_delete_links(net, bearer_id); |
0d051bf9 | 411 | b->media->disable_media(b); |
1a90632d | 412 | RCU_INIT_POINTER(b->media_ptr, NULL); |
b39e465e JM |
413 | if (b->disc) |
414 | tipc_disc_delete(b->disc); | |
5b7066c3 | 415 | RCU_INIT_POINTER(tn->bearer_list[bearer_id], NULL); |
2a7ee696 | 416 | tipc_bearer_put(b); |
35c55c98 | 417 | tipc_mon_delete(net, bearer_id); |
b97bf3fd PL |
418 | } |
419 | ||
d0f91938 EH |
420 | int tipc_enable_l2_media(struct net *net, struct tipc_bearer *b, |
421 | struct nlattr *attr[]) | |
e4d050cb | 422 | { |
52dfae5c JM |
423 | char *dev_name = strchr((const char *)b->name, ':') + 1; |
424 | int hwaddr_len = b->media->hwaddr_len; | |
425 | u8 node_id[NODE_ID_LEN] = {0,}; | |
e4d050cb | 426 | struct net_device *dev; |
e4d050cb YX |
427 | |
428 | /* Find device with specified name */ | |
52dfae5c | 429 | dev = dev_get_by_name(net, dev_name); |
e4d050cb YX |
430 | if (!dev) |
431 | return -ENODEV; | |
6cd8ec58 | 432 | if (tipc_mtu_bad(dev)) { |
3de81b75 MK |
433 | dev_put(dev); |
434 | return -EINVAL; | |
435 | } | |
6c9081a3 JR |
436 | if (dev == net->loopback_dev) { |
437 | dev_put(dev); | |
438 | pr_info("Enabling <%s> not permitted\n", b->name); | |
439 | return -EINVAL; | |
440 | } | |
e4d050cb | 441 | |
52dfae5c JM |
442 | /* Autoconfigure own node identity if needed */ |
443 | if (!tipc_own_id(net) && hwaddr_len <= NODE_ID_LEN) { | |
444 | memcpy(node_id, dev->dev_addr, hwaddr_len); | |
445 | tipc_net_init(net, node_id, 0); | |
446 | } | |
447 | if (!tipc_own_id(net)) { | |
63135ee0 | 448 | dev_put(dev); |
52dfae5c JM |
449 | pr_warn("Failed to obtain node identity\n"); |
450 | return -EINVAL; | |
451 | } | |
452 | ||
38504c28 | 453 | /* Associate TIPC bearer with L2 bearer */ |
2231c5af | 454 | rcu_assign_pointer(b->media_ptr, dev); |
d55c60eb PB |
455 | b->pt.dev = dev; |
456 | b->pt.type = htons(ETH_P_TIPC); | |
457 | b->pt.func = tipc_l2_rcv_msg; | |
458 | dev_add_pack(&b->pt); | |
38504c28 | 459 | memset(&b->bcast_addr, 0, sizeof(b->bcast_addr)); |
52dfae5c | 460 | memcpy(b->bcast_addr.value, dev->broadcast, hwaddr_len); |
e4d050cb | 461 | b->bcast_addr.media_id = b->media->type_id; |
9999974a | 462 | b->bcast_addr.broadcast = TIPC_BROADCAST_SUPPORT; |
e4d050cb | 463 | b->mtu = dev->mtu; |
6cf86280 | 464 | b->media->raw2addr(b, &b->addr, (const char *)dev->dev_addr); |
e4d050cb YX |
465 | rcu_assign_pointer(dev->tipc_ptr, b); |
466 | return 0; | |
467 | } | |
468 | ||
38504c28 | 469 | /* tipc_disable_l2_media - detach TIPC bearer from an L2 interface |
ec6a1649 | 470 | * @b: the target bearer |
e4d050cb | 471 | * |
282b3a05 | 472 | * Mark L2 bearer as inactive so that incoming buffers are thrown away |
e4d050cb YX |
473 | */ |
474 | void tipc_disable_l2_media(struct tipc_bearer *b) | |
475 | { | |
2231c5af YX |
476 | struct net_device *dev; |
477 | ||
478 | dev = (struct net_device *)rtnl_dereference(b->media_ptr); | |
d55c60eb | 479 | dev_remove_pack(&b->pt); |
e4d050cb | 480 | RCU_INIT_POINTER(dev->tipc_ptr, NULL); |
f1c8d8cb | 481 | synchronize_net(); |
e4d050cb YX |
482 | dev_put(dev); |
483 | } | |
484 | ||
485 | /** | |
38504c28 | 486 | * tipc_l2_send_msg - send a TIPC packet out over an L2 interface |
ec6a1649 | 487 | * @net: the associated network namespace |
5b7066c3 | 488 | * @skb: the packet to be sent |
1a90632d | 489 | * @b: the bearer through which the packet is to be sent |
e4d050cb YX |
490 | * @dest: peer destination address |
491 | */ | |
7214bcf8 | 492 | int tipc_l2_send_msg(struct net *net, struct sk_buff *skb, |
1da46568 | 493 | struct tipc_bearer *b, struct tipc_media_addr *dest) |
e4d050cb | 494 | { |
2231c5af | 495 | struct net_device *dev; |
e4d050cb | 496 | int delta; |
2231c5af | 497 | |
30a4616c | 498 | dev = (struct net_device *)rcu_dereference(b->media_ptr); |
2231c5af YX |
499 | if (!dev) |
500 | return 0; | |
e4d050cb | 501 | |
0d051bf9 JPM |
502 | delta = SKB_DATA_ALIGN(dev->hard_header_len - skb_headroom(skb)); |
503 | if ((delta > 0) && pskb_expand_head(skb, delta, 0, GFP_ATOMIC)) { | |
504 | kfree_skb(skb); | |
505 | return 0; | |
506 | } | |
7214bcf8 JPM |
507 | skb_reset_network_header(skb); |
508 | skb->dev = dev; | |
509 | skb->protocol = htons(ETH_P_TIPC); | |
510 | dev_hard_header(skb, dev, ETH_P_TIPC, dest->value, | |
511 | dev->dev_addr, skb->len); | |
512 | dev_queue_xmit(skb); | |
e4d050cb YX |
513 | return 0; |
514 | } | |
515 | ||
9999974a JPM |
516 | bool tipc_bearer_bcast_support(struct net *net, u32 bearer_id) |
517 | { | |
518 | bool supp = false; | |
519 | struct tipc_bearer *b; | |
520 | ||
521 | rcu_read_lock(); | |
522 | b = bearer_get(net, bearer_id); | |
523 | if (b) | |
524 | supp = (b->bcast_addr.broadcast == TIPC_BROADCAST_SUPPORT); | |
525 | rcu_read_unlock(); | |
526 | return supp; | |
527 | } | |
528 | ||
959e1781 JPM |
529 | int tipc_bearer_mtu(struct net *net, u32 bearer_id) |
530 | { | |
531 | int mtu = 0; | |
532 | struct tipc_bearer *b; | |
533 | ||
534 | rcu_read_lock(); | |
ae28ea5c | 535 | b = bearer_get(net, bearer_id); |
959e1781 JPM |
536 | if (b) |
537 | mtu = b->mtu; | |
538 | rcu_read_unlock(); | |
539 | return mtu; | |
540 | } | |
541 | ||
3ae6d66b XL |
542 | int tipc_bearer_min_mtu(struct net *net, u32 bearer_id) |
543 | { | |
544 | int mtu = TIPC_MIN_BEARER_MTU; | |
545 | struct tipc_bearer *b; | |
546 | ||
547 | rcu_read_lock(); | |
548 | b = bearer_get(net, bearer_id); | |
549 | if (b) | |
550 | mtu += b->encap_hlen; | |
551 | rcu_read_unlock(); | |
552 | return mtu; | |
553 | } | |
554 | ||
60852d67 JPM |
555 | /* tipc_bearer_xmit_skb - sends buffer to destination over bearer |
556 | */ | |
557 | void tipc_bearer_xmit_skb(struct net *net, u32 bearer_id, | |
558 | struct sk_buff *skb, | |
559 | struct tipc_media_addr *dest) | |
560 | { | |
0d051bf9 | 561 | struct tipc_msg *hdr = buf_msg(skb); |
60852d67 JPM |
562 | struct tipc_bearer *b; |
563 | ||
564 | rcu_read_lock(); | |
0d051bf9 | 565 | b = bearer_get(net, bearer_id); |
fc1b6d6d TL |
566 | if (likely(b && (test_bit(0, &b->up) || msg_is_reset(hdr)))) { |
567 | #ifdef CONFIG_TIPC_CRYPTO | |
568 | tipc_crypto_xmit(net, &skb, b, dest, NULL); | |
569 | if (skb) | |
570 | #endif | |
571 | b->media->send_msg(net, skb, b, dest); | |
572 | } else { | |
4e801fa1 | 573 | kfree_skb(skb); |
fc1b6d6d | 574 | } |
60852d67 | 575 | rcu_read_unlock(); |
60852d67 JPM |
576 | } |
577 | ||
af9b028e JPM |
578 | /* tipc_bearer_xmit() -send buffer to destination over bearer |
579 | */ | |
580 | void tipc_bearer_xmit(struct net *net, u32 bearer_id, | |
581 | struct sk_buff_head *xmitq, | |
fc1b6d6d TL |
582 | struct tipc_media_addr *dst, |
583 | struct tipc_node *__dnode) | |
af9b028e | 584 | { |
af9b028e JPM |
585 | struct tipc_bearer *b; |
586 | struct sk_buff *skb, *tmp; | |
587 | ||
588 | if (skb_queue_empty(xmitq)) | |
589 | return; | |
590 | ||
591 | rcu_read_lock(); | |
0d051bf9 | 592 | b = bearer_get(net, bearer_id); |
4e801fa1 JPM |
593 | if (unlikely(!b)) |
594 | __skb_queue_purge(xmitq); | |
595 | skb_queue_walk_safe(xmitq, skb, tmp) { | |
596 | __skb_dequeue(xmitq); | |
fc1b6d6d TL |
597 | if (likely(test_bit(0, &b->up) || msg_is_reset(buf_msg(skb)))) { |
598 | #ifdef CONFIG_TIPC_CRYPTO | |
599 | tipc_crypto_xmit(net, &skb, b, dst, __dnode); | |
600 | if (skb) | |
601 | #endif | |
602 | b->media->send_msg(net, skb, b, dst); | |
603 | } else { | |
5128b185 | 604 | kfree_skb(skb); |
fc1b6d6d | 605 | } |
b06b281e JPM |
606 | } |
607 | rcu_read_unlock(); | |
608 | } | |
609 | ||
610 | /* tipc_bearer_bc_xmit() - broadcast buffers to all destinations | |
611 | */ | |
612 | void tipc_bearer_bc_xmit(struct net *net, u32 bearer_id, | |
613 | struct sk_buff_head *xmitq) | |
614 | { | |
615 | struct tipc_net *tn = tipc_net(net); | |
fc1b6d6d | 616 | struct tipc_media_addr *dst; |
b06b281e JPM |
617 | int net_id = tn->net_id; |
618 | struct tipc_bearer *b; | |
619 | struct sk_buff *skb, *tmp; | |
620 | struct tipc_msg *hdr; | |
621 | ||
622 | rcu_read_lock(); | |
0d051bf9 JPM |
623 | b = bearer_get(net, bearer_id); |
624 | if (unlikely(!b || !test_bit(0, &b->up))) | |
4e801fa1 JPM |
625 | __skb_queue_purge(xmitq); |
626 | skb_queue_walk_safe(xmitq, skb, tmp) { | |
627 | hdr = buf_msg(skb); | |
628 | msg_set_non_seq(hdr, 1); | |
629 | msg_set_mc_netid(hdr, net_id); | |
630 | __skb_dequeue(xmitq); | |
fc1b6d6d TL |
631 | dst = &b->bcast_addr; |
632 | #ifdef CONFIG_TIPC_CRYPTO | |
633 | tipc_crypto_xmit(net, &skb, b, dst, NULL); | |
634 | if (skb) | |
635 | #endif | |
636 | b->media->send_msg(net, skb, b, dst); | |
af9b028e JPM |
637 | } |
638 | rcu_read_unlock(); | |
639 | } | |
640 | ||
6e967adf YX |
641 | /** |
642 | * tipc_l2_rcv_msg - handle incoming TIPC message from an interface | |
d8141208 | 643 | * @skb: the received message |
6e967adf YX |
644 | * @dev: the net device that the packet was received on |
645 | * @pt: the packet_type structure which was used to register this handler | |
646 | * @orig_dev: the original receive net device in case the device is a bond | |
647 | * | |
648 | * Accept only packets explicitly sent to this node, or broadcast packets; | |
649 | * ignores packets sent using interface multicast, and traffic sent to other | |
650 | * nodes (which can happen if interface is running in promiscuous mode). | |
651 | */ | |
4e801fa1 | 652 | static int tipc_l2_rcv_msg(struct sk_buff *skb, struct net_device *dev, |
6e967adf YX |
653 | struct packet_type *pt, struct net_device *orig_dev) |
654 | { | |
1a90632d | 655 | struct tipc_bearer *b; |
6e967adf | 656 | |
6e967adf | 657 | rcu_read_lock(); |
30a4616c XL |
658 | b = rcu_dereference(dev->tipc_ptr) ?: |
659 | rcu_dereference(orig_dev->tipc_ptr); | |
0d051bf9 | 660 | if (likely(b && test_bit(0, &b->up) && |
fed5f571 | 661 | (skb->pkt_type <= PACKET_MULTICAST))) { |
a8305bff | 662 | skb_mark_not_on_list(skb); |
fc1b6d6d | 663 | TIPC_SKB_CB(skb)->flags = 0; |
d55c60eb | 664 | tipc_rcv(dev_net(b->pt.dev), skb, b); |
4e801fa1 JPM |
665 | rcu_read_unlock(); |
666 | return NET_RX_SUCCESS; | |
6e967adf YX |
667 | } |
668 | rcu_read_unlock(); | |
4e801fa1 | 669 | kfree_skb(skb); |
6e967adf YX |
670 | return NET_RX_DROP; |
671 | } | |
672 | ||
673 | /** | |
674 | * tipc_l2_device_event - handle device events from network device | |
675 | * @nb: the context of the notification | |
676 | * @evt: the type of event | |
677 | * @ptr: the net device that the event was on | |
678 | * | |
679 | * This function is called by the Ethernet driver in case of link | |
680 | * change event. | |
681 | */ | |
682 | static int tipc_l2_device_event(struct notifier_block *nb, unsigned long evt, | |
683 | void *ptr) | |
684 | { | |
6e967adf | 685 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
c93d3baa | 686 | struct net *net = dev_net(dev); |
1a90632d | 687 | struct tipc_bearer *b; |
6e967adf | 688 | |
1a90632d JPM |
689 | b = rtnl_dereference(dev->tipc_ptr); |
690 | if (!b) | |
6e967adf | 691 | return NOTIFY_DONE; |
6e967adf | 692 | |
cf5f55f7 | 693 | trace_tipc_l2_device_event(dev, b, evt); |
6e967adf YX |
694 | switch (evt) { |
695 | case NETDEV_CHANGE: | |
94b6ddce PB |
696 | if (netif_carrier_ok(dev) && netif_oper_up(dev)) { |
697 | test_and_set_bit_lock(0, &b->up); | |
6e967adf | 698 | break; |
94b6ddce | 699 | } |
df561f66 | 700 | fallthrough; |
282b3a05 | 701 | case NETDEV_GOING_DOWN: |
0d051bf9 | 702 | clear_bit_unlock(0, &b->up); |
5b7066c3 JPM |
703 | tipc_reset_bearer(net, b); |
704 | break; | |
94b6ddce PB |
705 | case NETDEV_UP: |
706 | test_and_set_bit_lock(0, &b->up); | |
707 | break; | |
6e967adf | 708 | case NETDEV_CHANGEMTU: |
6cd8ec58 | 709 | if (tipc_mtu_bad(dev)) { |
3de81b75 MK |
710 | bearer_disable(net, b); |
711 | break; | |
712 | } | |
713 | b->mtu = dev->mtu; | |
1a90632d | 714 | tipc_reset_bearer(net, b); |
a21a584d | 715 | break; |
6e967adf | 716 | case NETDEV_CHANGEADDR: |
1a90632d | 717 | b->media->raw2addr(b, &b->addr, |
6cf86280 | 718 | (const char *)dev->dev_addr); |
1a90632d | 719 | tipc_reset_bearer(net, b); |
6e967adf YX |
720 | break; |
721 | case NETDEV_UNREGISTER: | |
722 | case NETDEV_CHANGENAME: | |
8e0deed9 | 723 | bearer_disable(net, b); |
6e967adf YX |
724 | break; |
725 | } | |
6e967adf YX |
726 | return NOTIFY_OK; |
727 | } | |
728 | ||
6e967adf YX |
729 | static struct notifier_block notifier = { |
730 | .notifier_call = tipc_l2_device_event, | |
731 | .priority = 0, | |
732 | }; | |
733 | ||
734 | int tipc_bearer_setup(void) | |
735 | { | |
d55c60eb | 736 | return register_netdevice_notifier(¬ifier); |
6e967adf YX |
737 | } |
738 | ||
739 | void tipc_bearer_cleanup(void) | |
740 | { | |
741 | unregister_netdevice_notifier(¬ifier); | |
6e967adf | 742 | } |
b97bf3fd | 743 | |
f2f9800d | 744 | void tipc_bearer_stop(struct net *net) |
b97bf3fd | 745 | { |
ae28ea5c | 746 | struct tipc_net *tn = tipc_net(net); |
1a90632d | 747 | struct tipc_bearer *b; |
b97bf3fd PL |
748 | u32 i; |
749 | ||
b97bf3fd | 750 | for (i = 0; i < MAX_BEARERS; i++) { |
1a90632d JPM |
751 | b = rtnl_dereference(tn->bearer_list[i]); |
752 | if (b) { | |
753 | bearer_disable(net, b); | |
7f9f95d9 | 754 | tn->bearer_list[i] = NULL; |
3874ccbb | 755 | } |
b97bf3fd | 756 | } |
b97bf3fd | 757 | } |
0655f6a8 | 758 | |
6c9081a3 JR |
759 | void tipc_clone_to_loopback(struct net *net, struct sk_buff_head *pkts) |
760 | { | |
761 | struct net_device *dev = net->loopback_dev; | |
762 | struct sk_buff *skb, *_skb; | |
763 | int exp; | |
764 | ||
765 | skb_queue_walk(pkts, _skb) { | |
766 | skb = pskb_copy(_skb, GFP_ATOMIC); | |
767 | if (!skb) | |
768 | continue; | |
769 | ||
770 | exp = SKB_DATA_ALIGN(dev->hard_header_len - skb_headroom(skb)); | |
771 | if (exp > 0 && pskb_expand_head(skb, exp, 0, GFP_ATOMIC)) { | |
772 | kfree_skb(skb); | |
773 | continue; | |
774 | } | |
775 | ||
776 | skb_reset_network_header(skb); | |
777 | dev_hard_header(skb, dev, ETH_P_TIPC, dev->dev_addr, | |
778 | dev->dev_addr, skb->len); | |
779 | skb->dev = dev; | |
780 | skb->pkt_type = PACKET_HOST; | |
781 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
782 | skb->protocol = eth_type_trans(skb, dev); | |
a0f0db82 | 783 | netif_rx(skb); |
6c9081a3 JR |
784 | } |
785 | } | |
786 | ||
787 | static int tipc_loopback_rcv_pkt(struct sk_buff *skb, struct net_device *dev, | |
788 | struct packet_type *pt, struct net_device *od) | |
789 | { | |
790 | consume_skb(skb); | |
791 | return NET_RX_SUCCESS; | |
792 | } | |
793 | ||
794 | int tipc_attach_loopback(struct net *net) | |
795 | { | |
796 | struct net_device *dev = net->loopback_dev; | |
797 | struct tipc_net *tn = tipc_net(net); | |
798 | ||
799 | if (!dev) | |
800 | return -ENODEV; | |
801 | ||
d62607c3 | 802 | netdev_hold(dev, &tn->loopback_pt.dev_tracker, GFP_KERNEL); |
6c9081a3 JR |
803 | tn->loopback_pt.dev = dev; |
804 | tn->loopback_pt.type = htons(ETH_P_TIPC); | |
805 | tn->loopback_pt.func = tipc_loopback_rcv_pkt; | |
806 | dev_add_pack(&tn->loopback_pt); | |
807 | return 0; | |
808 | } | |
809 | ||
810 | void tipc_detach_loopback(struct net *net) | |
811 | { | |
812 | struct tipc_net *tn = tipc_net(net); | |
813 | ||
814 | dev_remove_pack(&tn->loopback_pt); | |
d62607c3 | 815 | netdev_put(net->loopback_dev, &tn->loopback_pt.dev_tracker); |
6c9081a3 JR |
816 | } |
817 | ||
35b9dd76 | 818 | /* Caller should hold rtnl_lock to protect the bearer */ |
d8182804 | 819 | static int __tipc_nl_add_bearer(struct tipc_nl_msg *msg, |
f2f67390 | 820 | struct tipc_bearer *bearer, int nlflags) |
35b9dd76 RA |
821 | { |
822 | void *hdr; | |
823 | struct nlattr *attrs; | |
824 | struct nlattr *prop; | |
825 | ||
bfb3e5dd | 826 | hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family, |
f2f67390 | 827 | nlflags, TIPC_NL_BEARER_GET); |
35b9dd76 RA |
828 | if (!hdr) |
829 | return -EMSGSIZE; | |
830 | ||
ae0be8de | 831 | attrs = nla_nest_start_noflag(msg->skb, TIPC_NLA_BEARER); |
35b9dd76 RA |
832 | if (!attrs) |
833 | goto msg_full; | |
834 | ||
835 | if (nla_put_string(msg->skb, TIPC_NLA_BEARER_NAME, bearer->name)) | |
836 | goto attr_msg_full; | |
837 | ||
ae0be8de | 838 | prop = nla_nest_start_noflag(msg->skb, TIPC_NLA_BEARER_PROP); |
35b9dd76 RA |
839 | if (!prop) |
840 | goto prop_msg_full; | |
841 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, bearer->priority)) | |
842 | goto prop_msg_full; | |
843 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, bearer->tolerance)) | |
844 | goto prop_msg_full; | |
16ad3f40 | 845 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, bearer->max_win)) |
35b9dd76 | 846 | goto prop_msg_full; |
682cd3cf GM |
847 | if (bearer->media->type_id == TIPC_MEDIA_TYPE_UDP) |
848 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_MTU, bearer->mtu)) | |
849 | goto prop_msg_full; | |
35b9dd76 RA |
850 | |
851 | nla_nest_end(msg->skb, prop); | |
fdb3accc RA |
852 | |
853 | #ifdef CONFIG_TIPC_MEDIA_UDP | |
854 | if (bearer->media->type_id == TIPC_MEDIA_TYPE_UDP) { | |
855 | if (tipc_udp_nl_add_bearer_data(msg, bearer)) | |
856 | goto attr_msg_full; | |
857 | } | |
858 | #endif | |
859 | ||
35b9dd76 RA |
860 | nla_nest_end(msg->skb, attrs); |
861 | genlmsg_end(msg->skb, hdr); | |
862 | ||
863 | return 0; | |
864 | ||
865 | prop_msg_full: | |
866 | nla_nest_cancel(msg->skb, prop); | |
867 | attr_msg_full: | |
868 | nla_nest_cancel(msg->skb, attrs); | |
869 | msg_full: | |
870 | genlmsg_cancel(msg->skb, hdr); | |
871 | ||
872 | return -EMSGSIZE; | |
873 | } | |
874 | ||
875 | int tipc_nl_bearer_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
876 | { | |
877 | int err; | |
878 | int i = cb->args[0]; | |
879 | struct tipc_bearer *bearer; | |
880 | struct tipc_nl_msg msg; | |
7f9f95d9 | 881 | struct net *net = sock_net(skb->sk); |
ae28ea5c | 882 | struct tipc_net *tn = tipc_net(net); |
35b9dd76 RA |
883 | |
884 | if (i == MAX_BEARERS) | |
885 | return 0; | |
886 | ||
887 | msg.skb = skb; | |
888 | msg.portid = NETLINK_CB(cb->skb).portid; | |
889 | msg.seq = cb->nlh->nlmsg_seq; | |
890 | ||
891 | rtnl_lock(); | |
892 | for (i = 0; i < MAX_BEARERS; i++) { | |
7f9f95d9 | 893 | bearer = rtnl_dereference(tn->bearer_list[i]); |
35b9dd76 RA |
894 | if (!bearer) |
895 | continue; | |
896 | ||
f2f67390 | 897 | err = __tipc_nl_add_bearer(&msg, bearer, NLM_F_MULTI); |
35b9dd76 RA |
898 | if (err) |
899 | break; | |
900 | } | |
901 | rtnl_unlock(); | |
902 | ||
903 | cb->args[0] = i; | |
904 | return skb->len; | |
905 | } | |
906 | ||
907 | int tipc_nl_bearer_get(struct sk_buff *skb, struct genl_info *info) | |
908 | { | |
909 | int err; | |
910 | char *name; | |
911 | struct sk_buff *rep; | |
912 | struct tipc_bearer *bearer; | |
913 | struct tipc_nl_msg msg; | |
914 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
7f9f95d9 | 915 | struct net *net = genl_info_net(info); |
35b9dd76 RA |
916 | |
917 | if (!info->attrs[TIPC_NLA_BEARER]) | |
918 | return -EINVAL; | |
919 | ||
8cb08174 JB |
920 | err = nla_parse_nested_deprecated(attrs, TIPC_NLA_BEARER_MAX, |
921 | info->attrs[TIPC_NLA_BEARER], | |
922 | tipc_nl_bearer_policy, info->extack); | |
35b9dd76 RA |
923 | if (err) |
924 | return err; | |
925 | ||
926 | if (!attrs[TIPC_NLA_BEARER_NAME]) | |
927 | return -EINVAL; | |
928 | name = nla_data(attrs[TIPC_NLA_BEARER_NAME]); | |
929 | ||
930 | rep = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); | |
931 | if (!rep) | |
932 | return -ENOMEM; | |
933 | ||
934 | msg.skb = rep; | |
935 | msg.portid = info->snd_portid; | |
936 | msg.seq = info->snd_seq; | |
937 | ||
938 | rtnl_lock(); | |
7f9f95d9 | 939 | bearer = tipc_bearer_find(net, name); |
35b9dd76 RA |
940 | if (!bearer) { |
941 | err = -EINVAL; | |
b83e214b | 942 | NL_SET_ERR_MSG(info->extack, "Bearer not found"); |
35b9dd76 RA |
943 | goto err_out; |
944 | } | |
945 | ||
f2f67390 | 946 | err = __tipc_nl_add_bearer(&msg, bearer, 0); |
35b9dd76 RA |
947 | if (err) |
948 | goto err_out; | |
949 | rtnl_unlock(); | |
950 | ||
951 | return genlmsg_reply(rep, info); | |
952 | err_out: | |
953 | rtnl_unlock(); | |
954 | nlmsg_free(rep); | |
955 | ||
956 | return err; | |
957 | } | |
958 | ||
d59d8b77 | 959 | int __tipc_nl_bearer_disable(struct sk_buff *skb, struct genl_info *info) |
0655f6a8 RA |
960 | { |
961 | int err; | |
962 | char *name; | |
963 | struct tipc_bearer *bearer; | |
964 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
9ab15465 | 965 | struct net *net = sock_net(skb->sk); |
0655f6a8 RA |
966 | |
967 | if (!info->attrs[TIPC_NLA_BEARER]) | |
968 | return -EINVAL; | |
969 | ||
8cb08174 JB |
970 | err = nla_parse_nested_deprecated(attrs, TIPC_NLA_BEARER_MAX, |
971 | info->attrs[TIPC_NLA_BEARER], | |
972 | tipc_nl_bearer_policy, info->extack); | |
0655f6a8 RA |
973 | if (err) |
974 | return err; | |
975 | ||
976 | if (!attrs[TIPC_NLA_BEARER_NAME]) | |
977 | return -EINVAL; | |
978 | ||
979 | name = nla_data(attrs[TIPC_NLA_BEARER_NAME]); | |
980 | ||
7f9f95d9 | 981 | bearer = tipc_bearer_find(net, name); |
b83e214b HL |
982 | if (!bearer) { |
983 | NL_SET_ERR_MSG(info->extack, "Bearer not found"); | |
0655f6a8 | 984 | return -EINVAL; |
b83e214b | 985 | } |
0655f6a8 | 986 | |
b1c29f6b | 987 | bearer_disable(net, bearer); |
0655f6a8 RA |
988 | |
989 | return 0; | |
990 | } | |
991 | ||
d59d8b77 YX |
992 | int tipc_nl_bearer_disable(struct sk_buff *skb, struct genl_info *info) |
993 | { | |
994 | int err; | |
995 | ||
996 | rtnl_lock(); | |
997 | err = __tipc_nl_bearer_disable(skb, info); | |
998 | rtnl_unlock(); | |
999 | ||
1000 | return err; | |
1001 | } | |
1002 | ||
45cf7edf | 1003 | int __tipc_nl_bearer_enable(struct sk_buff *skb, struct genl_info *info) |
0655f6a8 RA |
1004 | { |
1005 | int err; | |
1006 | char *bearer; | |
1007 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
9ab15465 | 1008 | struct net *net = sock_net(skb->sk); |
20263641 | 1009 | u32 domain = 0; |
0655f6a8 RA |
1010 | u32 prio; |
1011 | ||
1012 | prio = TIPC_MEDIA_LINK_PRI; | |
0655f6a8 RA |
1013 | |
1014 | if (!info->attrs[TIPC_NLA_BEARER]) | |
1015 | return -EINVAL; | |
1016 | ||
8cb08174 JB |
1017 | err = nla_parse_nested_deprecated(attrs, TIPC_NLA_BEARER_MAX, |
1018 | info->attrs[TIPC_NLA_BEARER], | |
1019 | tipc_nl_bearer_policy, info->extack); | |
0655f6a8 RA |
1020 | if (err) |
1021 | return err; | |
1022 | ||
1023 | if (!attrs[TIPC_NLA_BEARER_NAME]) | |
1024 | return -EINVAL; | |
1025 | ||
1026 | bearer = nla_data(attrs[TIPC_NLA_BEARER_NAME]); | |
1027 | ||
1028 | if (attrs[TIPC_NLA_BEARER_DOMAIN]) | |
1029 | domain = nla_get_u32(attrs[TIPC_NLA_BEARER_DOMAIN]); | |
1030 | ||
1031 | if (attrs[TIPC_NLA_BEARER_PROP]) { | |
1032 | struct nlattr *props[TIPC_NLA_PROP_MAX + 1]; | |
1033 | ||
1034 | err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_BEARER_PROP], | |
1035 | props); | |
1036 | if (err) | |
1037 | return err; | |
1038 | ||
1039 | if (props[TIPC_NLA_PROP_PRIO]) | |
1040 | prio = nla_get_u32(props[TIPC_NLA_PROP_PRIO]); | |
1041 | } | |
1042 | ||
b83e214b HL |
1043 | return tipc_enable_bearer(net, bearer, domain, prio, attrs, |
1044 | info->extack); | |
45cf7edf YX |
1045 | } |
1046 | ||
1047 | int tipc_nl_bearer_enable(struct sk_buff *skb, struct genl_info *info) | |
1048 | { | |
1049 | int err; | |
1050 | ||
0655f6a8 | 1051 | rtnl_lock(); |
45cf7edf | 1052 | err = __tipc_nl_bearer_enable(skb, info); |
0655f6a8 RA |
1053 | rtnl_unlock(); |
1054 | ||
45cf7edf | 1055 | return err; |
0655f6a8 | 1056 | } |
315c00bc | 1057 | |
ef20cd4d RA |
1058 | int tipc_nl_bearer_add(struct sk_buff *skb, struct genl_info *info) |
1059 | { | |
1060 | int err; | |
1061 | char *name; | |
1062 | struct tipc_bearer *b; | |
1063 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
1064 | struct net *net = sock_net(skb->sk); | |
1065 | ||
1066 | if (!info->attrs[TIPC_NLA_BEARER]) | |
1067 | return -EINVAL; | |
1068 | ||
8cb08174 JB |
1069 | err = nla_parse_nested_deprecated(attrs, TIPC_NLA_BEARER_MAX, |
1070 | info->attrs[TIPC_NLA_BEARER], | |
1071 | tipc_nl_bearer_policy, info->extack); | |
ef20cd4d RA |
1072 | if (err) |
1073 | return err; | |
1074 | ||
1075 | if (!attrs[TIPC_NLA_BEARER_NAME]) | |
1076 | return -EINVAL; | |
1077 | name = nla_data(attrs[TIPC_NLA_BEARER_NAME]); | |
1078 | ||
1079 | rtnl_lock(); | |
1080 | b = tipc_bearer_find(net, name); | |
1081 | if (!b) { | |
1082 | rtnl_unlock(); | |
b83e214b | 1083 | NL_SET_ERR_MSG(info->extack, "Bearer not found"); |
ef20cd4d RA |
1084 | return -EINVAL; |
1085 | } | |
1086 | ||
1087 | #ifdef CONFIG_TIPC_MEDIA_UDP | |
1088 | if (attrs[TIPC_NLA_BEARER_UDP_OPTS]) { | |
3871aa01 SY |
1089 | if (b->media->type_id != TIPC_MEDIA_TYPE_UDP) { |
1090 | rtnl_unlock(); | |
1091 | NL_SET_ERR_MSG(info->extack, "UDP option is unsupported"); | |
1092 | return -EINVAL; | |
1093 | } | |
1094 | ||
ef20cd4d RA |
1095 | err = tipc_udp_nl_bearer_add(b, |
1096 | attrs[TIPC_NLA_BEARER_UDP_OPTS]); | |
1097 | if (err) { | |
1098 | rtnl_unlock(); | |
1099 | return err; | |
1100 | } | |
1101 | } | |
1102 | #endif | |
1103 | rtnl_unlock(); | |
1104 | ||
1105 | return 0; | |
1106 | } | |
1107 | ||
93532bb1 | 1108 | int __tipc_nl_bearer_set(struct sk_buff *skb, struct genl_info *info) |
315c00bc | 1109 | { |
315c00bc RA |
1110 | struct tipc_bearer *b; |
1111 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
c3d6fb85 | 1112 | struct net *net = sock_net(skb->sk); |
37c64cf6 JM |
1113 | char *name; |
1114 | int err; | |
315c00bc RA |
1115 | |
1116 | if (!info->attrs[TIPC_NLA_BEARER]) | |
1117 | return -EINVAL; | |
1118 | ||
8cb08174 JB |
1119 | err = nla_parse_nested_deprecated(attrs, TIPC_NLA_BEARER_MAX, |
1120 | info->attrs[TIPC_NLA_BEARER], | |
1121 | tipc_nl_bearer_policy, info->extack); | |
315c00bc RA |
1122 | if (err) |
1123 | return err; | |
1124 | ||
1125 | if (!attrs[TIPC_NLA_BEARER_NAME]) | |
1126 | return -EINVAL; | |
1127 | name = nla_data(attrs[TIPC_NLA_BEARER_NAME]); | |
1128 | ||
7f9f95d9 | 1129 | b = tipc_bearer_find(net, name); |
b83e214b HL |
1130 | if (!b) { |
1131 | NL_SET_ERR_MSG(info->extack, "Bearer not found"); | |
315c00bc | 1132 | return -EINVAL; |
b83e214b | 1133 | } |
315c00bc RA |
1134 | |
1135 | if (attrs[TIPC_NLA_BEARER_PROP]) { | |
1136 | struct nlattr *props[TIPC_NLA_PROP_MAX + 1]; | |
1137 | ||
1138 | err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_BEARER_PROP], | |
1139 | props); | |
93532bb1 | 1140 | if (err) |
315c00bc | 1141 | return err; |
315c00bc | 1142 | |
37c64cf6 | 1143 | if (props[TIPC_NLA_PROP_TOL]) { |
315c00bc | 1144 | b->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]); |
682cd3cf | 1145 | tipc_node_apply_property(net, b, TIPC_NLA_PROP_TOL); |
37c64cf6 | 1146 | } |
315c00bc RA |
1147 | if (props[TIPC_NLA_PROP_PRIO]) |
1148 | b->priority = nla_get_u32(props[TIPC_NLA_PROP_PRIO]); | |
1149 | if (props[TIPC_NLA_PROP_WIN]) | |
16ad3f40 | 1150 | b->max_win = nla_get_u32(props[TIPC_NLA_PROP_WIN]); |
682cd3cf | 1151 | if (props[TIPC_NLA_PROP_MTU]) { |
b83e214b HL |
1152 | if (b->media->type_id != TIPC_MEDIA_TYPE_UDP) { |
1153 | NL_SET_ERR_MSG(info->extack, | |
1154 | "MTU property is unsupported"); | |
682cd3cf | 1155 | return -EINVAL; |
b83e214b | 1156 | } |
682cd3cf | 1157 | #ifdef CONFIG_TIPC_MEDIA_UDP |
35a089b5 XL |
1158 | if (nla_get_u32(props[TIPC_NLA_PROP_MTU]) < |
1159 | b->encap_hlen + TIPC_MIN_BEARER_MTU) { | |
b83e214b HL |
1160 | NL_SET_ERR_MSG(info->extack, |
1161 | "MTU value is out-of-range"); | |
682cd3cf | 1162 | return -EINVAL; |
b83e214b | 1163 | } |
682cd3cf GM |
1164 | b->mtu = nla_get_u32(props[TIPC_NLA_PROP_MTU]); |
1165 | tipc_node_apply_property(net, b, TIPC_NLA_PROP_MTU); | |
1166 | #endif | |
1167 | } | |
315c00bc | 1168 | } |
315c00bc RA |
1169 | |
1170 | return 0; | |
1171 | } | |
46f15c67 | 1172 | |
93532bb1 YX |
1173 | int tipc_nl_bearer_set(struct sk_buff *skb, struct genl_info *info) |
1174 | { | |
1175 | int err; | |
1176 | ||
1177 | rtnl_lock(); | |
1178 | err = __tipc_nl_bearer_set(skb, info); | |
1179 | rtnl_unlock(); | |
1180 | ||
1181 | return err; | |
1182 | } | |
1183 | ||
d8182804 | 1184 | static int __tipc_nl_add_media(struct tipc_nl_msg *msg, |
f2f67390 | 1185 | struct tipc_media *media, int nlflags) |
46f15c67 RA |
1186 | { |
1187 | void *hdr; | |
1188 | struct nlattr *attrs; | |
1189 | struct nlattr *prop; | |
1190 | ||
bfb3e5dd | 1191 | hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family, |
f2f67390 | 1192 | nlflags, TIPC_NL_MEDIA_GET); |
46f15c67 RA |
1193 | if (!hdr) |
1194 | return -EMSGSIZE; | |
1195 | ||
ae0be8de | 1196 | attrs = nla_nest_start_noflag(msg->skb, TIPC_NLA_MEDIA); |
46f15c67 RA |
1197 | if (!attrs) |
1198 | goto msg_full; | |
1199 | ||
1200 | if (nla_put_string(msg->skb, TIPC_NLA_MEDIA_NAME, media->name)) | |
1201 | goto attr_msg_full; | |
1202 | ||
ae0be8de | 1203 | prop = nla_nest_start_noflag(msg->skb, TIPC_NLA_MEDIA_PROP); |
46f15c67 RA |
1204 | if (!prop) |
1205 | goto prop_msg_full; | |
1206 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, media->priority)) | |
1207 | goto prop_msg_full; | |
1208 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, media->tolerance)) | |
1209 | goto prop_msg_full; | |
16ad3f40 | 1210 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, media->max_win)) |
46f15c67 | 1211 | goto prop_msg_full; |
901271e0 GM |
1212 | if (media->type_id == TIPC_MEDIA_TYPE_UDP) |
1213 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_MTU, media->mtu)) | |
1214 | goto prop_msg_full; | |
46f15c67 RA |
1215 | |
1216 | nla_nest_end(msg->skb, prop); | |
1217 | nla_nest_end(msg->skb, attrs); | |
1218 | genlmsg_end(msg->skb, hdr); | |
1219 | ||
1220 | return 0; | |
1221 | ||
1222 | prop_msg_full: | |
1223 | nla_nest_cancel(msg->skb, prop); | |
1224 | attr_msg_full: | |
1225 | nla_nest_cancel(msg->skb, attrs); | |
1226 | msg_full: | |
1227 | genlmsg_cancel(msg->skb, hdr); | |
1228 | ||
1229 | return -EMSGSIZE; | |
1230 | } | |
1231 | ||
1232 | int tipc_nl_media_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
1233 | { | |
1234 | int err; | |
1235 | int i = cb->args[0]; | |
1236 | struct tipc_nl_msg msg; | |
1237 | ||
1238 | if (i == MAX_MEDIA) | |
1239 | return 0; | |
1240 | ||
1241 | msg.skb = skb; | |
1242 | msg.portid = NETLINK_CB(cb->skb).portid; | |
1243 | msg.seq = cb->nlh->nlmsg_seq; | |
1244 | ||
1245 | rtnl_lock(); | |
1246 | for (; media_info_array[i] != NULL; i++) { | |
f2f67390 ND |
1247 | err = __tipc_nl_add_media(&msg, media_info_array[i], |
1248 | NLM_F_MULTI); | |
46f15c67 RA |
1249 | if (err) |
1250 | break; | |
1251 | } | |
1252 | rtnl_unlock(); | |
1253 | ||
1254 | cb->args[0] = i; | |
1255 | return skb->len; | |
1256 | } | |
1257 | ||
1258 | int tipc_nl_media_get(struct sk_buff *skb, struct genl_info *info) | |
1259 | { | |
1260 | int err; | |
1261 | char *name; | |
1262 | struct tipc_nl_msg msg; | |
1263 | struct tipc_media *media; | |
1264 | struct sk_buff *rep; | |
44194cb1 | 1265 | struct nlattr *attrs[TIPC_NLA_MEDIA_MAX + 1]; |
46f15c67 RA |
1266 | |
1267 | if (!info->attrs[TIPC_NLA_MEDIA]) | |
1268 | return -EINVAL; | |
1269 | ||
8cb08174 JB |
1270 | err = nla_parse_nested_deprecated(attrs, TIPC_NLA_MEDIA_MAX, |
1271 | info->attrs[TIPC_NLA_MEDIA], | |
1272 | tipc_nl_media_policy, info->extack); | |
46f15c67 RA |
1273 | if (err) |
1274 | return err; | |
1275 | ||
1276 | if (!attrs[TIPC_NLA_MEDIA_NAME]) | |
1277 | return -EINVAL; | |
1278 | name = nla_data(attrs[TIPC_NLA_MEDIA_NAME]); | |
1279 | ||
1280 | rep = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); | |
1281 | if (!rep) | |
1282 | return -ENOMEM; | |
1283 | ||
1284 | msg.skb = rep; | |
1285 | msg.portid = info->snd_portid; | |
1286 | msg.seq = info->snd_seq; | |
1287 | ||
1288 | rtnl_lock(); | |
1289 | media = tipc_media_find(name); | |
1290 | if (!media) { | |
b83e214b | 1291 | NL_SET_ERR_MSG(info->extack, "Media not found"); |
46f15c67 RA |
1292 | err = -EINVAL; |
1293 | goto err_out; | |
1294 | } | |
1295 | ||
f2f67390 | 1296 | err = __tipc_nl_add_media(&msg, media, 0); |
46f15c67 RA |
1297 | if (err) |
1298 | goto err_out; | |
1299 | rtnl_unlock(); | |
1300 | ||
1301 | return genlmsg_reply(rep, info); | |
1302 | err_out: | |
1303 | rtnl_unlock(); | |
1304 | nlmsg_free(rep); | |
1305 | ||
1306 | return err; | |
1307 | } | |
1e55417d | 1308 | |
07ffb223 | 1309 | int __tipc_nl_media_set(struct sk_buff *skb, struct genl_info *info) |
1e55417d RA |
1310 | { |
1311 | int err; | |
1312 | char *name; | |
1313 | struct tipc_media *m; | |
44194cb1 | 1314 | struct nlattr *attrs[TIPC_NLA_MEDIA_MAX + 1]; |
1e55417d RA |
1315 | |
1316 | if (!info->attrs[TIPC_NLA_MEDIA]) | |
1317 | return -EINVAL; | |
1318 | ||
8cb08174 JB |
1319 | err = nla_parse_nested_deprecated(attrs, TIPC_NLA_MEDIA_MAX, |
1320 | info->attrs[TIPC_NLA_MEDIA], | |
1321 | tipc_nl_media_policy, info->extack); | |
1e55417d RA |
1322 | |
1323 | if (!attrs[TIPC_NLA_MEDIA_NAME]) | |
1324 | return -EINVAL; | |
1325 | name = nla_data(attrs[TIPC_NLA_MEDIA_NAME]); | |
1326 | ||
1e55417d | 1327 | m = tipc_media_find(name); |
b83e214b HL |
1328 | if (!m) { |
1329 | NL_SET_ERR_MSG(info->extack, "Media not found"); | |
1e55417d | 1330 | return -EINVAL; |
b83e214b | 1331 | } |
1e55417d RA |
1332 | if (attrs[TIPC_NLA_MEDIA_PROP]) { |
1333 | struct nlattr *props[TIPC_NLA_PROP_MAX + 1]; | |
1334 | ||
1335 | err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_MEDIA_PROP], | |
1336 | props); | |
07ffb223 | 1337 | if (err) |
1e55417d | 1338 | return err; |
1e55417d RA |
1339 | |
1340 | if (props[TIPC_NLA_PROP_TOL]) | |
1341 | m->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]); | |
1342 | if (props[TIPC_NLA_PROP_PRIO]) | |
1343 | m->priority = nla_get_u32(props[TIPC_NLA_PROP_PRIO]); | |
1344 | if (props[TIPC_NLA_PROP_WIN]) | |
16ad3f40 | 1345 | m->max_win = nla_get_u32(props[TIPC_NLA_PROP_WIN]); |
901271e0 | 1346 | if (props[TIPC_NLA_PROP_MTU]) { |
b83e214b HL |
1347 | if (m->type_id != TIPC_MEDIA_TYPE_UDP) { |
1348 | NL_SET_ERR_MSG(info->extack, | |
1349 | "MTU property is unsupported"); | |
901271e0 | 1350 | return -EINVAL; |
b83e214b | 1351 | } |
901271e0 GM |
1352 | #ifdef CONFIG_TIPC_MEDIA_UDP |
1353 | if (tipc_udp_mtu_bad(nla_get_u32 | |
b83e214b HL |
1354 | (props[TIPC_NLA_PROP_MTU]))) { |
1355 | NL_SET_ERR_MSG(info->extack, | |
1356 | "MTU value is out-of-range"); | |
901271e0 | 1357 | return -EINVAL; |
b83e214b | 1358 | } |
901271e0 GM |
1359 | m->mtu = nla_get_u32(props[TIPC_NLA_PROP_MTU]); |
1360 | #endif | |
1361 | } | |
1e55417d | 1362 | } |
1e55417d RA |
1363 | |
1364 | return 0; | |
1365 | } | |
07ffb223 YX |
1366 | |
1367 | int tipc_nl_media_set(struct sk_buff *skb, struct genl_info *info) | |
1368 | { | |
1369 | int err; | |
1370 | ||
1371 | rtnl_lock(); | |
1372 | err = __tipc_nl_media_set(skb, info); | |
1373 | rtnl_unlock(); | |
1374 | ||
1375 | return err; | |
1376 | } |