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Commit | Line | Data |
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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 | { |
7f9f95d9 | 179 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
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 | { |
7f9f95d9 | 214 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
1a90632d | 215 | struct tipc_bearer *b; |
7a2f7d18 YX |
216 | |
217 | rcu_read_lock(); | |
30a4616c | 218 | b = rcu_dereference(tn->bearer_list[bearer_id]); |
1a90632d | 219 | if (b) |
b39e465e | 220 | tipc_disc_add_dest(b->disc); |
7a2f7d18 | 221 | rcu_read_unlock(); |
b97bf3fd PL |
222 | } |
223 | ||
7f9f95d9 | 224 | void tipc_bearer_remove_dest(struct net *net, u32 bearer_id, u32 dest) |
b97bf3fd | 225 | { |
7f9f95d9 | 226 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
1a90632d | 227 | struct tipc_bearer *b; |
7a2f7d18 YX |
228 | |
229 | rcu_read_lock(); | |
30a4616c | 230 | b = rcu_dereference(tn->bearer_list[bearer_id]); |
1a90632d | 231 | if (b) |
b39e465e | 232 | tipc_disc_remove_dest(b->disc); |
7a2f7d18 | 233 | rcu_read_unlock(); |
b97bf3fd PL |
234 | } |
235 | ||
b97bf3fd PL |
236 | /** |
237 | * tipc_enable_bearer - enable bearer with the given name | |
ec6a1649 RD |
238 | * @net: the applicable net namespace |
239 | * @name: bearer name to enable | |
240 | * @disc_domain: bearer domain | |
241 | * @prio: bearer priority | |
242 | * @attr: nlattr array | |
c4307285 | 243 | */ |
9ab15465 | 244 | static int tipc_enable_bearer(struct net *net, const char *name, |
cb30a633 | 245 | u32 disc_domain, u32 prio, |
d0f91938 | 246 | struct nlattr *attr[]) |
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 = ""; |
b97bf3fd | 257 | |
f19765f4 | 258 | if (!bearer_name_validate(name, &b_names)) { |
cb30a633 JM |
259 | errstr = "illegal name"; |
260 | goto rejected; | |
a10bd924 | 261 | } |
cb30a633 | 262 | |
cb30a633 JM |
263 | if (prio > TIPC_MAX_LINK_PRI && prio != TIPC_MEDIA_LINK_PRI) { |
264 | errstr = "illegal priority"; | |
265 | goto rejected; | |
a10bd924 | 266 | } |
b97bf3fd | 267 | |
1a90632d JPM |
268 | m = tipc_media_find(b_names.media_name); |
269 | if (!m) { | |
cb30a633 JM |
270 | errstr = "media not registered"; |
271 | goto rejected; | |
b97bf3fd | 272 | } |
16cb4b33 | 273 | |
cb30a633 JM |
274 | if (prio == TIPC_MEDIA_LINK_PRI) |
275 | prio = m->priority; | |
b97bf3fd | 276 | |
cb30a633 JM |
277 | /* Check new bearer vs existing ones and find free bearer id if any */ |
278 | while (bearer_id < MAX_BEARERS) { | |
279 | b = rtnl_dereference(tn->bearer_list[bearer_id]); | |
280 | if (!b) | |
281 | break; | |
1a90632d | 282 | if (!strcmp(name, b->name)) { |
cb30a633 JM |
283 | errstr = "already enabled"; |
284 | goto rejected; | |
b97bf3fd | 285 | } |
cb30a633 JM |
286 | bearer_id++; |
287 | if (b->priority != prio) | |
288 | continue; | |
289 | if (++with_this_prio <= 2) | |
290 | continue; | |
291 | pr_warn("Bearer <%s>: already 2 bearers with priority %u\n", | |
292 | name, prio); | |
293 | if (prio == TIPC_MIN_LINK_PRI) { | |
294 | errstr = "cannot adjust to lower"; | |
295 | goto rejected; | |
b97bf3fd | 296 | } |
cb30a633 JM |
297 | pr_warn("Bearer <%s>: trying with adjusted priority\n", name); |
298 | prio--; | |
299 | bearer_id = 0; | |
300 | with_this_prio = 1; | |
b97bf3fd | 301 | } |
cb30a633 | 302 | |
b97bf3fd | 303 | if (bearer_id >= MAX_BEARERS) { |
cb30a633 JM |
304 | errstr = "max 3 bearers permitted"; |
305 | goto rejected; | |
b97bf3fd PL |
306 | } |
307 | ||
1a90632d JPM |
308 | b = kzalloc(sizeof(*b), GFP_ATOMIC); |
309 | if (!b) | |
7216cd94 YX |
310 | return -ENOMEM; |
311 | ||
1a90632d JPM |
312 | strcpy(b->name, name); |
313 | b->media = m; | |
314 | res = m->enable_media(net, b, attr); | |
b97bf3fd | 315 | if (res) { |
19142551 | 316 | kfree(b); |
cb30a633 JM |
317 | errstr = "failed to enable media"; |
318 | goto rejected; | |
b97bf3fd PL |
319 | } |
320 | ||
1a90632d JPM |
321 | b->identity = bearer_id; |
322 | b->tolerance = m->tolerance; | |
16ad3f40 JM |
323 | b->min_win = m->min_win; |
324 | b->max_win = m->max_win; | |
1a90632d JPM |
325 | b->domain = disc_domain; |
326 | b->net_plane = bearer_id + 'A'; | |
cb30a633 | 327 | b->priority = prio; |
2a7ee696 | 328 | refcount_set(&b->refcnt, 1); |
3a777ff8 | 329 | |
4e801fa1 | 330 | res = tipc_disc_create(net, b, &b->bcast_addr, &skb); |
3a777ff8 | 331 | if (res) { |
1a90632d | 332 | bearer_disable(net, b); |
cb30a633 JM |
333 | errstr = "failed to create discoverer"; |
334 | goto rejected; | |
3a777ff8 | 335 | } |
3874ccbb | 336 | |
97982782 | 337 | test_and_set_bit_lock(0, &b->up); |
1a90632d | 338 | rcu_assign_pointer(tn->bearer_list[bearer_id], b); |
4e801fa1 JPM |
339 | if (skb) |
340 | tipc_bearer_xmit_skb(net, bearer_id, skb, &b->bcast_addr); | |
35c55c98 | 341 | |
19142551 TR |
342 | if (tipc_mon_create(net, bearer_id)) { |
343 | bearer_disable(net, b); | |
35c55c98 | 344 | return -ENOMEM; |
19142551 | 345 | } |
35c55c98 | 346 | |
20263641 JM |
347 | pr_info("Enabled bearer <%s>, priority %u\n", name, prio); |
348 | ||
cb30a633 JM |
349 | return res; |
350 | rejected: | |
20263641 | 351 | pr_warn("Enabling of bearer <%s> rejected, %s\n", name, errstr); |
b97bf3fd PL |
352 | return res; |
353 | } | |
354 | ||
355 | /** | |
512137ee | 356 | * tipc_reset_bearer - Reset all links established over this bearer |
ec6a1649 RD |
357 | * @net: the applicable net namespace |
358 | * @b: the target bearer | |
b97bf3fd | 359 | */ |
1a90632d | 360 | static int tipc_reset_bearer(struct net *net, struct tipc_bearer *b) |
b97bf3fd | 361 | { |
1a90632d JPM |
362 | pr_info("Resetting bearer <%s>\n", b->name); |
363 | tipc_node_delete_links(net, b->identity); | |
364 | tipc_disc_reset(net, b); | |
0e35fd5e | 365 | return 0; |
b97bf3fd PL |
366 | } |
367 | ||
2a7ee696 TL |
368 | bool tipc_bearer_hold(struct tipc_bearer *b) |
369 | { | |
370 | return (b && refcount_inc_not_zero(&b->refcnt)); | |
371 | } | |
372 | ||
373 | void tipc_bearer_put(struct tipc_bearer *b) | |
374 | { | |
375 | if (b && refcount_dec_and_test(&b->refcnt)) | |
376 | kfree_rcu(b, rcu); | |
377 | } | |
378 | ||
b97bf3fd | 379 | /** |
ec6a1649 RD |
380 | * bearer_disable - disable this bearer |
381 | * @net: the applicable net namespace | |
382 | * @b: the bearer to disable | |
c4307285 | 383 | * |
7216cd94 | 384 | * Note: This routine assumes caller holds RTNL lock. |
b97bf3fd | 385 | */ |
1a90632d | 386 | static void bearer_disable(struct net *net, struct tipc_bearer *b) |
b97bf3fd | 387 | { |
5b7066c3 JPM |
388 | struct tipc_net *tn = tipc_net(net); |
389 | int bearer_id = b->identity; | |
3874ccbb | 390 | |
1a90632d | 391 | pr_info("Disabling bearer <%s>\n", b->name); |
0d051bf9 | 392 | clear_bit_unlock(0, &b->up); |
5b7066c3 | 393 | tipc_node_delete_links(net, bearer_id); |
0d051bf9 | 394 | b->media->disable_media(b); |
1a90632d | 395 | RCU_INIT_POINTER(b->media_ptr, NULL); |
b39e465e JM |
396 | if (b->disc) |
397 | tipc_disc_delete(b->disc); | |
5b7066c3 | 398 | RCU_INIT_POINTER(tn->bearer_list[bearer_id], NULL); |
2a7ee696 | 399 | tipc_bearer_put(b); |
35c55c98 | 400 | tipc_mon_delete(net, bearer_id); |
b97bf3fd PL |
401 | } |
402 | ||
d0f91938 EH |
403 | int tipc_enable_l2_media(struct net *net, struct tipc_bearer *b, |
404 | struct nlattr *attr[]) | |
e4d050cb | 405 | { |
52dfae5c JM |
406 | char *dev_name = strchr((const char *)b->name, ':') + 1; |
407 | int hwaddr_len = b->media->hwaddr_len; | |
408 | u8 node_id[NODE_ID_LEN] = {0,}; | |
e4d050cb | 409 | struct net_device *dev; |
e4d050cb YX |
410 | |
411 | /* Find device with specified name */ | |
52dfae5c | 412 | dev = dev_get_by_name(net, dev_name); |
e4d050cb YX |
413 | if (!dev) |
414 | return -ENODEV; | |
3de81b75 MK |
415 | if (tipc_mtu_bad(dev, 0)) { |
416 | dev_put(dev); | |
417 | return -EINVAL; | |
418 | } | |
6c9081a3 JR |
419 | if (dev == net->loopback_dev) { |
420 | dev_put(dev); | |
421 | pr_info("Enabling <%s> not permitted\n", b->name); | |
422 | return -EINVAL; | |
423 | } | |
e4d050cb | 424 | |
52dfae5c JM |
425 | /* Autoconfigure own node identity if needed */ |
426 | if (!tipc_own_id(net) && hwaddr_len <= NODE_ID_LEN) { | |
427 | memcpy(node_id, dev->dev_addr, hwaddr_len); | |
428 | tipc_net_init(net, node_id, 0); | |
429 | } | |
430 | if (!tipc_own_id(net)) { | |
63135ee0 | 431 | dev_put(dev); |
52dfae5c JM |
432 | pr_warn("Failed to obtain node identity\n"); |
433 | return -EINVAL; | |
434 | } | |
435 | ||
38504c28 | 436 | /* Associate TIPC bearer with L2 bearer */ |
2231c5af | 437 | rcu_assign_pointer(b->media_ptr, dev); |
d55c60eb PB |
438 | b->pt.dev = dev; |
439 | b->pt.type = htons(ETH_P_TIPC); | |
440 | b->pt.func = tipc_l2_rcv_msg; | |
441 | dev_add_pack(&b->pt); | |
38504c28 | 442 | memset(&b->bcast_addr, 0, sizeof(b->bcast_addr)); |
52dfae5c | 443 | memcpy(b->bcast_addr.value, dev->broadcast, hwaddr_len); |
e4d050cb | 444 | b->bcast_addr.media_id = b->media->type_id; |
9999974a | 445 | b->bcast_addr.broadcast = TIPC_BROADCAST_SUPPORT; |
e4d050cb | 446 | b->mtu = dev->mtu; |
38504c28 | 447 | b->media->raw2addr(b, &b->addr, (char *)dev->dev_addr); |
e4d050cb YX |
448 | rcu_assign_pointer(dev->tipc_ptr, b); |
449 | return 0; | |
450 | } | |
451 | ||
38504c28 | 452 | /* tipc_disable_l2_media - detach TIPC bearer from an L2 interface |
ec6a1649 | 453 | * @b: the target bearer |
e4d050cb | 454 | * |
282b3a05 | 455 | * Mark L2 bearer as inactive so that incoming buffers are thrown away |
e4d050cb YX |
456 | */ |
457 | void tipc_disable_l2_media(struct tipc_bearer *b) | |
458 | { | |
2231c5af YX |
459 | struct net_device *dev; |
460 | ||
461 | dev = (struct net_device *)rtnl_dereference(b->media_ptr); | |
d55c60eb | 462 | dev_remove_pack(&b->pt); |
e4d050cb | 463 | RCU_INIT_POINTER(dev->tipc_ptr, NULL); |
f1c8d8cb | 464 | synchronize_net(); |
e4d050cb YX |
465 | dev_put(dev); |
466 | } | |
467 | ||
468 | /** | |
38504c28 | 469 | * tipc_l2_send_msg - send a TIPC packet out over an L2 interface |
ec6a1649 | 470 | * @net: the associated network namespace |
5b7066c3 | 471 | * @skb: the packet to be sent |
1a90632d | 472 | * @b: the bearer through which the packet is to be sent |
e4d050cb YX |
473 | * @dest: peer destination address |
474 | */ | |
7214bcf8 | 475 | int tipc_l2_send_msg(struct net *net, struct sk_buff *skb, |
1da46568 | 476 | struct tipc_bearer *b, struct tipc_media_addr *dest) |
e4d050cb | 477 | { |
2231c5af | 478 | struct net_device *dev; |
e4d050cb | 479 | int delta; |
2231c5af | 480 | |
30a4616c | 481 | dev = (struct net_device *)rcu_dereference(b->media_ptr); |
2231c5af YX |
482 | if (!dev) |
483 | return 0; | |
e4d050cb | 484 | |
0d051bf9 JPM |
485 | delta = SKB_DATA_ALIGN(dev->hard_header_len - skb_headroom(skb)); |
486 | if ((delta > 0) && pskb_expand_head(skb, delta, 0, GFP_ATOMIC)) { | |
487 | kfree_skb(skb); | |
488 | return 0; | |
489 | } | |
7214bcf8 JPM |
490 | skb_reset_network_header(skb); |
491 | skb->dev = dev; | |
492 | skb->protocol = htons(ETH_P_TIPC); | |
493 | dev_hard_header(skb, dev, ETH_P_TIPC, dest->value, | |
494 | dev->dev_addr, skb->len); | |
495 | dev_queue_xmit(skb); | |
e4d050cb YX |
496 | return 0; |
497 | } | |
498 | ||
9999974a JPM |
499 | bool tipc_bearer_bcast_support(struct net *net, u32 bearer_id) |
500 | { | |
501 | bool supp = false; | |
502 | struct tipc_bearer *b; | |
503 | ||
504 | rcu_read_lock(); | |
505 | b = bearer_get(net, bearer_id); | |
506 | if (b) | |
507 | supp = (b->bcast_addr.broadcast == TIPC_BROADCAST_SUPPORT); | |
508 | rcu_read_unlock(); | |
509 | return supp; | |
510 | } | |
511 | ||
959e1781 JPM |
512 | int tipc_bearer_mtu(struct net *net, u32 bearer_id) |
513 | { | |
514 | int mtu = 0; | |
515 | struct tipc_bearer *b; | |
516 | ||
517 | rcu_read_lock(); | |
30a4616c | 518 | b = rcu_dereference(tipc_net(net)->bearer_list[bearer_id]); |
959e1781 JPM |
519 | if (b) |
520 | mtu = b->mtu; | |
521 | rcu_read_unlock(); | |
522 | return mtu; | |
523 | } | |
524 | ||
60852d67 JPM |
525 | /* tipc_bearer_xmit_skb - sends buffer to destination over bearer |
526 | */ | |
527 | void tipc_bearer_xmit_skb(struct net *net, u32 bearer_id, | |
528 | struct sk_buff *skb, | |
529 | struct tipc_media_addr *dest) | |
530 | { | |
0d051bf9 | 531 | struct tipc_msg *hdr = buf_msg(skb); |
60852d67 JPM |
532 | struct tipc_bearer *b; |
533 | ||
534 | rcu_read_lock(); | |
0d051bf9 | 535 | b = bearer_get(net, bearer_id); |
fc1b6d6d TL |
536 | if (likely(b && (test_bit(0, &b->up) || msg_is_reset(hdr)))) { |
537 | #ifdef CONFIG_TIPC_CRYPTO | |
538 | tipc_crypto_xmit(net, &skb, b, dest, NULL); | |
539 | if (skb) | |
540 | #endif | |
541 | b->media->send_msg(net, skb, b, dest); | |
542 | } else { | |
4e801fa1 | 543 | kfree_skb(skb); |
fc1b6d6d | 544 | } |
60852d67 | 545 | rcu_read_unlock(); |
60852d67 JPM |
546 | } |
547 | ||
af9b028e JPM |
548 | /* tipc_bearer_xmit() -send buffer to destination over bearer |
549 | */ | |
550 | void tipc_bearer_xmit(struct net *net, u32 bearer_id, | |
551 | struct sk_buff_head *xmitq, | |
fc1b6d6d TL |
552 | struct tipc_media_addr *dst, |
553 | struct tipc_node *__dnode) | |
af9b028e | 554 | { |
af9b028e JPM |
555 | struct tipc_bearer *b; |
556 | struct sk_buff *skb, *tmp; | |
557 | ||
558 | if (skb_queue_empty(xmitq)) | |
559 | return; | |
560 | ||
561 | rcu_read_lock(); | |
0d051bf9 | 562 | b = bearer_get(net, bearer_id); |
4e801fa1 JPM |
563 | if (unlikely(!b)) |
564 | __skb_queue_purge(xmitq); | |
565 | skb_queue_walk_safe(xmitq, skb, tmp) { | |
566 | __skb_dequeue(xmitq); | |
fc1b6d6d TL |
567 | if (likely(test_bit(0, &b->up) || msg_is_reset(buf_msg(skb)))) { |
568 | #ifdef CONFIG_TIPC_CRYPTO | |
569 | tipc_crypto_xmit(net, &skb, b, dst, __dnode); | |
570 | if (skb) | |
571 | #endif | |
572 | b->media->send_msg(net, skb, b, dst); | |
573 | } else { | |
5128b185 | 574 | kfree_skb(skb); |
fc1b6d6d | 575 | } |
b06b281e JPM |
576 | } |
577 | rcu_read_unlock(); | |
578 | } | |
579 | ||
580 | /* tipc_bearer_bc_xmit() - broadcast buffers to all destinations | |
581 | */ | |
582 | void tipc_bearer_bc_xmit(struct net *net, u32 bearer_id, | |
583 | struct sk_buff_head *xmitq) | |
584 | { | |
585 | struct tipc_net *tn = tipc_net(net); | |
fc1b6d6d | 586 | struct tipc_media_addr *dst; |
b06b281e JPM |
587 | int net_id = tn->net_id; |
588 | struct tipc_bearer *b; | |
589 | struct sk_buff *skb, *tmp; | |
590 | struct tipc_msg *hdr; | |
591 | ||
592 | rcu_read_lock(); | |
0d051bf9 JPM |
593 | b = bearer_get(net, bearer_id); |
594 | if (unlikely(!b || !test_bit(0, &b->up))) | |
4e801fa1 JPM |
595 | __skb_queue_purge(xmitq); |
596 | skb_queue_walk_safe(xmitq, skb, tmp) { | |
597 | hdr = buf_msg(skb); | |
598 | msg_set_non_seq(hdr, 1); | |
599 | msg_set_mc_netid(hdr, net_id); | |
600 | __skb_dequeue(xmitq); | |
fc1b6d6d TL |
601 | dst = &b->bcast_addr; |
602 | #ifdef CONFIG_TIPC_CRYPTO | |
603 | tipc_crypto_xmit(net, &skb, b, dst, NULL); | |
604 | if (skb) | |
605 | #endif | |
606 | b->media->send_msg(net, skb, b, dst); | |
af9b028e JPM |
607 | } |
608 | rcu_read_unlock(); | |
609 | } | |
610 | ||
6e967adf YX |
611 | /** |
612 | * tipc_l2_rcv_msg - handle incoming TIPC message from an interface | |
d8141208 | 613 | * @skb: the received message |
6e967adf YX |
614 | * @dev: the net device that the packet was received on |
615 | * @pt: the packet_type structure which was used to register this handler | |
616 | * @orig_dev: the original receive net device in case the device is a bond | |
617 | * | |
618 | * Accept only packets explicitly sent to this node, or broadcast packets; | |
619 | * ignores packets sent using interface multicast, and traffic sent to other | |
620 | * nodes (which can happen if interface is running in promiscuous mode). | |
621 | */ | |
4e801fa1 | 622 | static int tipc_l2_rcv_msg(struct sk_buff *skb, struct net_device *dev, |
6e967adf YX |
623 | struct packet_type *pt, struct net_device *orig_dev) |
624 | { | |
1a90632d | 625 | struct tipc_bearer *b; |
6e967adf | 626 | |
6e967adf | 627 | rcu_read_lock(); |
30a4616c XL |
628 | b = rcu_dereference(dev->tipc_ptr) ?: |
629 | rcu_dereference(orig_dev->tipc_ptr); | |
0d051bf9 | 630 | if (likely(b && test_bit(0, &b->up) && |
fed5f571 | 631 | (skb->pkt_type <= PACKET_MULTICAST))) { |
a8305bff | 632 | skb_mark_not_on_list(skb); |
fc1b6d6d | 633 | TIPC_SKB_CB(skb)->flags = 0; |
d55c60eb | 634 | tipc_rcv(dev_net(b->pt.dev), skb, b); |
4e801fa1 JPM |
635 | rcu_read_unlock(); |
636 | return NET_RX_SUCCESS; | |
6e967adf YX |
637 | } |
638 | rcu_read_unlock(); | |
4e801fa1 | 639 | kfree_skb(skb); |
6e967adf YX |
640 | return NET_RX_DROP; |
641 | } | |
642 | ||
643 | /** | |
644 | * tipc_l2_device_event - handle device events from network device | |
645 | * @nb: the context of the notification | |
646 | * @evt: the type of event | |
647 | * @ptr: the net device that the event was on | |
648 | * | |
649 | * This function is called by the Ethernet driver in case of link | |
650 | * change event. | |
651 | */ | |
652 | static int tipc_l2_device_event(struct notifier_block *nb, unsigned long evt, | |
653 | void *ptr) | |
654 | { | |
6e967adf | 655 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
c93d3baa | 656 | struct net *net = dev_net(dev); |
1a90632d | 657 | struct tipc_bearer *b; |
6e967adf | 658 | |
1a90632d JPM |
659 | b = rtnl_dereference(dev->tipc_ptr); |
660 | if (!b) | |
6e967adf | 661 | return NOTIFY_DONE; |
6e967adf | 662 | |
cf5f55f7 | 663 | trace_tipc_l2_device_event(dev, b, evt); |
6e967adf YX |
664 | switch (evt) { |
665 | case NETDEV_CHANGE: | |
94b6ddce PB |
666 | if (netif_carrier_ok(dev) && netif_oper_up(dev)) { |
667 | test_and_set_bit_lock(0, &b->up); | |
6e967adf | 668 | break; |
94b6ddce | 669 | } |
df561f66 | 670 | fallthrough; |
282b3a05 | 671 | case NETDEV_GOING_DOWN: |
0d051bf9 | 672 | clear_bit_unlock(0, &b->up); |
5b7066c3 JPM |
673 | tipc_reset_bearer(net, b); |
674 | break; | |
94b6ddce PB |
675 | case NETDEV_UP: |
676 | test_and_set_bit_lock(0, &b->up); | |
677 | break; | |
6e967adf | 678 | case NETDEV_CHANGEMTU: |
3de81b75 MK |
679 | if (tipc_mtu_bad(dev, 0)) { |
680 | bearer_disable(net, b); | |
681 | break; | |
682 | } | |
683 | b->mtu = dev->mtu; | |
1a90632d | 684 | tipc_reset_bearer(net, b); |
a21a584d | 685 | break; |
6e967adf | 686 | case NETDEV_CHANGEADDR: |
1a90632d | 687 | b->media->raw2addr(b, &b->addr, |
5b7066c3 | 688 | (char *)dev->dev_addr); |
1a90632d | 689 | tipc_reset_bearer(net, b); |
6e967adf YX |
690 | break; |
691 | case NETDEV_UNREGISTER: | |
692 | case NETDEV_CHANGENAME: | |
8e0deed9 | 693 | bearer_disable(net, b); |
6e967adf YX |
694 | break; |
695 | } | |
6e967adf YX |
696 | return NOTIFY_OK; |
697 | } | |
698 | ||
6e967adf YX |
699 | static struct notifier_block notifier = { |
700 | .notifier_call = tipc_l2_device_event, | |
701 | .priority = 0, | |
702 | }; | |
703 | ||
704 | int tipc_bearer_setup(void) | |
705 | { | |
d55c60eb | 706 | return register_netdevice_notifier(¬ifier); |
6e967adf YX |
707 | } |
708 | ||
709 | void tipc_bearer_cleanup(void) | |
710 | { | |
711 | unregister_netdevice_notifier(¬ifier); | |
6e967adf | 712 | } |
b97bf3fd | 713 | |
f2f9800d | 714 | void tipc_bearer_stop(struct net *net) |
b97bf3fd | 715 | { |
7f9f95d9 | 716 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
1a90632d | 717 | struct tipc_bearer *b; |
b97bf3fd PL |
718 | u32 i; |
719 | ||
b97bf3fd | 720 | for (i = 0; i < MAX_BEARERS; i++) { |
1a90632d JPM |
721 | b = rtnl_dereference(tn->bearer_list[i]); |
722 | if (b) { | |
723 | bearer_disable(net, b); | |
7f9f95d9 | 724 | tn->bearer_list[i] = NULL; |
3874ccbb | 725 | } |
b97bf3fd | 726 | } |
b97bf3fd | 727 | } |
0655f6a8 | 728 | |
6c9081a3 JR |
729 | void tipc_clone_to_loopback(struct net *net, struct sk_buff_head *pkts) |
730 | { | |
731 | struct net_device *dev = net->loopback_dev; | |
732 | struct sk_buff *skb, *_skb; | |
733 | int exp; | |
734 | ||
735 | skb_queue_walk(pkts, _skb) { | |
736 | skb = pskb_copy(_skb, GFP_ATOMIC); | |
737 | if (!skb) | |
738 | continue; | |
739 | ||
740 | exp = SKB_DATA_ALIGN(dev->hard_header_len - skb_headroom(skb)); | |
741 | if (exp > 0 && pskb_expand_head(skb, exp, 0, GFP_ATOMIC)) { | |
742 | kfree_skb(skb); | |
743 | continue; | |
744 | } | |
745 | ||
746 | skb_reset_network_header(skb); | |
747 | dev_hard_header(skb, dev, ETH_P_TIPC, dev->dev_addr, | |
748 | dev->dev_addr, skb->len); | |
749 | skb->dev = dev; | |
750 | skb->pkt_type = PACKET_HOST; | |
751 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
752 | skb->protocol = eth_type_trans(skb, dev); | |
753 | netif_rx_ni(skb); | |
754 | } | |
755 | } | |
756 | ||
757 | static int tipc_loopback_rcv_pkt(struct sk_buff *skb, struct net_device *dev, | |
758 | struct packet_type *pt, struct net_device *od) | |
759 | { | |
760 | consume_skb(skb); | |
761 | return NET_RX_SUCCESS; | |
762 | } | |
763 | ||
764 | int tipc_attach_loopback(struct net *net) | |
765 | { | |
766 | struct net_device *dev = net->loopback_dev; | |
767 | struct tipc_net *tn = tipc_net(net); | |
768 | ||
769 | if (!dev) | |
770 | return -ENODEV; | |
771 | ||
772 | dev_hold(dev); | |
773 | tn->loopback_pt.dev = dev; | |
774 | tn->loopback_pt.type = htons(ETH_P_TIPC); | |
775 | tn->loopback_pt.func = tipc_loopback_rcv_pkt; | |
776 | dev_add_pack(&tn->loopback_pt); | |
777 | return 0; | |
778 | } | |
779 | ||
780 | void tipc_detach_loopback(struct net *net) | |
781 | { | |
782 | struct tipc_net *tn = tipc_net(net); | |
783 | ||
784 | dev_remove_pack(&tn->loopback_pt); | |
785 | dev_put(net->loopback_dev); | |
786 | } | |
787 | ||
35b9dd76 | 788 | /* Caller should hold rtnl_lock to protect the bearer */ |
d8182804 | 789 | static int __tipc_nl_add_bearer(struct tipc_nl_msg *msg, |
f2f67390 | 790 | struct tipc_bearer *bearer, int nlflags) |
35b9dd76 RA |
791 | { |
792 | void *hdr; | |
793 | struct nlattr *attrs; | |
794 | struct nlattr *prop; | |
795 | ||
bfb3e5dd | 796 | hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family, |
f2f67390 | 797 | nlflags, TIPC_NL_BEARER_GET); |
35b9dd76 RA |
798 | if (!hdr) |
799 | return -EMSGSIZE; | |
800 | ||
ae0be8de | 801 | attrs = nla_nest_start_noflag(msg->skb, TIPC_NLA_BEARER); |
35b9dd76 RA |
802 | if (!attrs) |
803 | goto msg_full; | |
804 | ||
805 | if (nla_put_string(msg->skb, TIPC_NLA_BEARER_NAME, bearer->name)) | |
806 | goto attr_msg_full; | |
807 | ||
ae0be8de | 808 | prop = nla_nest_start_noflag(msg->skb, TIPC_NLA_BEARER_PROP); |
35b9dd76 RA |
809 | if (!prop) |
810 | goto prop_msg_full; | |
811 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, bearer->priority)) | |
812 | goto prop_msg_full; | |
813 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, bearer->tolerance)) | |
814 | goto prop_msg_full; | |
16ad3f40 | 815 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, bearer->max_win)) |
35b9dd76 | 816 | goto prop_msg_full; |
682cd3cf GM |
817 | if (bearer->media->type_id == TIPC_MEDIA_TYPE_UDP) |
818 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_MTU, bearer->mtu)) | |
819 | goto prop_msg_full; | |
35b9dd76 RA |
820 | |
821 | nla_nest_end(msg->skb, prop); | |
fdb3accc RA |
822 | |
823 | #ifdef CONFIG_TIPC_MEDIA_UDP | |
824 | if (bearer->media->type_id == TIPC_MEDIA_TYPE_UDP) { | |
825 | if (tipc_udp_nl_add_bearer_data(msg, bearer)) | |
826 | goto attr_msg_full; | |
827 | } | |
828 | #endif | |
829 | ||
35b9dd76 RA |
830 | nla_nest_end(msg->skb, attrs); |
831 | genlmsg_end(msg->skb, hdr); | |
832 | ||
833 | return 0; | |
834 | ||
835 | prop_msg_full: | |
836 | nla_nest_cancel(msg->skb, prop); | |
837 | attr_msg_full: | |
838 | nla_nest_cancel(msg->skb, attrs); | |
839 | msg_full: | |
840 | genlmsg_cancel(msg->skb, hdr); | |
841 | ||
842 | return -EMSGSIZE; | |
843 | } | |
844 | ||
845 | int tipc_nl_bearer_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
846 | { | |
847 | int err; | |
848 | int i = cb->args[0]; | |
849 | struct tipc_bearer *bearer; | |
850 | struct tipc_nl_msg msg; | |
7f9f95d9 YX |
851 | struct net *net = sock_net(skb->sk); |
852 | struct tipc_net *tn = net_generic(net, tipc_net_id); | |
35b9dd76 RA |
853 | |
854 | if (i == MAX_BEARERS) | |
855 | return 0; | |
856 | ||
857 | msg.skb = skb; | |
858 | msg.portid = NETLINK_CB(cb->skb).portid; | |
859 | msg.seq = cb->nlh->nlmsg_seq; | |
860 | ||
861 | rtnl_lock(); | |
862 | for (i = 0; i < MAX_BEARERS; i++) { | |
7f9f95d9 | 863 | bearer = rtnl_dereference(tn->bearer_list[i]); |
35b9dd76 RA |
864 | if (!bearer) |
865 | continue; | |
866 | ||
f2f67390 | 867 | err = __tipc_nl_add_bearer(&msg, bearer, NLM_F_MULTI); |
35b9dd76 RA |
868 | if (err) |
869 | break; | |
870 | } | |
871 | rtnl_unlock(); | |
872 | ||
873 | cb->args[0] = i; | |
874 | return skb->len; | |
875 | } | |
876 | ||
877 | int tipc_nl_bearer_get(struct sk_buff *skb, struct genl_info *info) | |
878 | { | |
879 | int err; | |
880 | char *name; | |
881 | struct sk_buff *rep; | |
882 | struct tipc_bearer *bearer; | |
883 | struct tipc_nl_msg msg; | |
884 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
7f9f95d9 | 885 | struct net *net = genl_info_net(info); |
35b9dd76 RA |
886 | |
887 | if (!info->attrs[TIPC_NLA_BEARER]) | |
888 | return -EINVAL; | |
889 | ||
8cb08174 JB |
890 | err = nla_parse_nested_deprecated(attrs, TIPC_NLA_BEARER_MAX, |
891 | info->attrs[TIPC_NLA_BEARER], | |
892 | tipc_nl_bearer_policy, info->extack); | |
35b9dd76 RA |
893 | if (err) |
894 | return err; | |
895 | ||
896 | if (!attrs[TIPC_NLA_BEARER_NAME]) | |
897 | return -EINVAL; | |
898 | name = nla_data(attrs[TIPC_NLA_BEARER_NAME]); | |
899 | ||
900 | rep = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); | |
901 | if (!rep) | |
902 | return -ENOMEM; | |
903 | ||
904 | msg.skb = rep; | |
905 | msg.portid = info->snd_portid; | |
906 | msg.seq = info->snd_seq; | |
907 | ||
908 | rtnl_lock(); | |
7f9f95d9 | 909 | bearer = tipc_bearer_find(net, name); |
35b9dd76 RA |
910 | if (!bearer) { |
911 | err = -EINVAL; | |
912 | goto err_out; | |
913 | } | |
914 | ||
f2f67390 | 915 | err = __tipc_nl_add_bearer(&msg, bearer, 0); |
35b9dd76 RA |
916 | if (err) |
917 | goto err_out; | |
918 | rtnl_unlock(); | |
919 | ||
920 | return genlmsg_reply(rep, info); | |
921 | err_out: | |
922 | rtnl_unlock(); | |
923 | nlmsg_free(rep); | |
924 | ||
925 | return err; | |
926 | } | |
927 | ||
d59d8b77 | 928 | int __tipc_nl_bearer_disable(struct sk_buff *skb, struct genl_info *info) |
0655f6a8 RA |
929 | { |
930 | int err; | |
931 | char *name; | |
932 | struct tipc_bearer *bearer; | |
933 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
9ab15465 | 934 | struct net *net = sock_net(skb->sk); |
0655f6a8 RA |
935 | |
936 | if (!info->attrs[TIPC_NLA_BEARER]) | |
937 | return -EINVAL; | |
938 | ||
8cb08174 JB |
939 | err = nla_parse_nested_deprecated(attrs, TIPC_NLA_BEARER_MAX, |
940 | info->attrs[TIPC_NLA_BEARER], | |
941 | tipc_nl_bearer_policy, info->extack); | |
0655f6a8 RA |
942 | if (err) |
943 | return err; | |
944 | ||
945 | if (!attrs[TIPC_NLA_BEARER_NAME]) | |
946 | return -EINVAL; | |
947 | ||
948 | name = nla_data(attrs[TIPC_NLA_BEARER_NAME]); | |
949 | ||
7f9f95d9 | 950 | bearer = tipc_bearer_find(net, name); |
d59d8b77 | 951 | if (!bearer) |
0655f6a8 | 952 | return -EINVAL; |
0655f6a8 | 953 | |
b1c29f6b | 954 | bearer_disable(net, bearer); |
0655f6a8 RA |
955 | |
956 | return 0; | |
957 | } | |
958 | ||
d59d8b77 YX |
959 | int tipc_nl_bearer_disable(struct sk_buff *skb, struct genl_info *info) |
960 | { | |
961 | int err; | |
962 | ||
963 | rtnl_lock(); | |
964 | err = __tipc_nl_bearer_disable(skb, info); | |
965 | rtnl_unlock(); | |
966 | ||
967 | return err; | |
968 | } | |
969 | ||
45cf7edf | 970 | int __tipc_nl_bearer_enable(struct sk_buff *skb, struct genl_info *info) |
0655f6a8 RA |
971 | { |
972 | int err; | |
973 | char *bearer; | |
974 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
9ab15465 | 975 | struct net *net = sock_net(skb->sk); |
20263641 | 976 | u32 domain = 0; |
0655f6a8 RA |
977 | u32 prio; |
978 | ||
979 | prio = TIPC_MEDIA_LINK_PRI; | |
0655f6a8 RA |
980 | |
981 | if (!info->attrs[TIPC_NLA_BEARER]) | |
982 | return -EINVAL; | |
983 | ||
8cb08174 JB |
984 | err = nla_parse_nested_deprecated(attrs, TIPC_NLA_BEARER_MAX, |
985 | info->attrs[TIPC_NLA_BEARER], | |
986 | tipc_nl_bearer_policy, info->extack); | |
0655f6a8 RA |
987 | if (err) |
988 | return err; | |
989 | ||
990 | if (!attrs[TIPC_NLA_BEARER_NAME]) | |
991 | return -EINVAL; | |
992 | ||
993 | bearer = nla_data(attrs[TIPC_NLA_BEARER_NAME]); | |
994 | ||
995 | if (attrs[TIPC_NLA_BEARER_DOMAIN]) | |
996 | domain = nla_get_u32(attrs[TIPC_NLA_BEARER_DOMAIN]); | |
997 | ||
998 | if (attrs[TIPC_NLA_BEARER_PROP]) { | |
999 | struct nlattr *props[TIPC_NLA_PROP_MAX + 1]; | |
1000 | ||
1001 | err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_BEARER_PROP], | |
1002 | props); | |
1003 | if (err) | |
1004 | return err; | |
1005 | ||
1006 | if (props[TIPC_NLA_PROP_PRIO]) | |
1007 | prio = nla_get_u32(props[TIPC_NLA_PROP_PRIO]); | |
1008 | } | |
1009 | ||
45cf7edf YX |
1010 | return tipc_enable_bearer(net, bearer, domain, prio, attrs); |
1011 | } | |
1012 | ||
1013 | int tipc_nl_bearer_enable(struct sk_buff *skb, struct genl_info *info) | |
1014 | { | |
1015 | int err; | |
1016 | ||
0655f6a8 | 1017 | rtnl_lock(); |
45cf7edf | 1018 | err = __tipc_nl_bearer_enable(skb, info); |
0655f6a8 RA |
1019 | rtnl_unlock(); |
1020 | ||
45cf7edf | 1021 | return err; |
0655f6a8 | 1022 | } |
315c00bc | 1023 | |
ef20cd4d RA |
1024 | int tipc_nl_bearer_add(struct sk_buff *skb, struct genl_info *info) |
1025 | { | |
1026 | int err; | |
1027 | char *name; | |
1028 | struct tipc_bearer *b; | |
1029 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
1030 | struct net *net = sock_net(skb->sk); | |
1031 | ||
1032 | if (!info->attrs[TIPC_NLA_BEARER]) | |
1033 | return -EINVAL; | |
1034 | ||
8cb08174 JB |
1035 | err = nla_parse_nested_deprecated(attrs, TIPC_NLA_BEARER_MAX, |
1036 | info->attrs[TIPC_NLA_BEARER], | |
1037 | tipc_nl_bearer_policy, info->extack); | |
ef20cd4d RA |
1038 | if (err) |
1039 | return err; | |
1040 | ||
1041 | if (!attrs[TIPC_NLA_BEARER_NAME]) | |
1042 | return -EINVAL; | |
1043 | name = nla_data(attrs[TIPC_NLA_BEARER_NAME]); | |
1044 | ||
1045 | rtnl_lock(); | |
1046 | b = tipc_bearer_find(net, name); | |
1047 | if (!b) { | |
1048 | rtnl_unlock(); | |
1049 | return -EINVAL; | |
1050 | } | |
1051 | ||
1052 | #ifdef CONFIG_TIPC_MEDIA_UDP | |
1053 | if (attrs[TIPC_NLA_BEARER_UDP_OPTS]) { | |
1054 | err = tipc_udp_nl_bearer_add(b, | |
1055 | attrs[TIPC_NLA_BEARER_UDP_OPTS]); | |
1056 | if (err) { | |
1057 | rtnl_unlock(); | |
1058 | return err; | |
1059 | } | |
1060 | } | |
1061 | #endif | |
1062 | rtnl_unlock(); | |
1063 | ||
1064 | return 0; | |
1065 | } | |
1066 | ||
93532bb1 | 1067 | int __tipc_nl_bearer_set(struct sk_buff *skb, struct genl_info *info) |
315c00bc | 1068 | { |
315c00bc RA |
1069 | struct tipc_bearer *b; |
1070 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
c3d6fb85 | 1071 | struct net *net = sock_net(skb->sk); |
37c64cf6 JM |
1072 | char *name; |
1073 | int err; | |
315c00bc RA |
1074 | |
1075 | if (!info->attrs[TIPC_NLA_BEARER]) | |
1076 | return -EINVAL; | |
1077 | ||
8cb08174 JB |
1078 | err = nla_parse_nested_deprecated(attrs, TIPC_NLA_BEARER_MAX, |
1079 | info->attrs[TIPC_NLA_BEARER], | |
1080 | tipc_nl_bearer_policy, info->extack); | |
315c00bc RA |
1081 | if (err) |
1082 | return err; | |
1083 | ||
1084 | if (!attrs[TIPC_NLA_BEARER_NAME]) | |
1085 | return -EINVAL; | |
1086 | name = nla_data(attrs[TIPC_NLA_BEARER_NAME]); | |
1087 | ||
7f9f95d9 | 1088 | b = tipc_bearer_find(net, name); |
93532bb1 | 1089 | if (!b) |
315c00bc | 1090 | return -EINVAL; |
315c00bc RA |
1091 | |
1092 | if (attrs[TIPC_NLA_BEARER_PROP]) { | |
1093 | struct nlattr *props[TIPC_NLA_PROP_MAX + 1]; | |
1094 | ||
1095 | err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_BEARER_PROP], | |
1096 | props); | |
93532bb1 | 1097 | if (err) |
315c00bc | 1098 | return err; |
315c00bc | 1099 | |
37c64cf6 | 1100 | if (props[TIPC_NLA_PROP_TOL]) { |
315c00bc | 1101 | b->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]); |
682cd3cf | 1102 | tipc_node_apply_property(net, b, TIPC_NLA_PROP_TOL); |
37c64cf6 | 1103 | } |
315c00bc RA |
1104 | if (props[TIPC_NLA_PROP_PRIO]) |
1105 | b->priority = nla_get_u32(props[TIPC_NLA_PROP_PRIO]); | |
1106 | if (props[TIPC_NLA_PROP_WIN]) | |
16ad3f40 | 1107 | b->max_win = nla_get_u32(props[TIPC_NLA_PROP_WIN]); |
682cd3cf GM |
1108 | if (props[TIPC_NLA_PROP_MTU]) { |
1109 | if (b->media->type_id != TIPC_MEDIA_TYPE_UDP) | |
1110 | return -EINVAL; | |
1111 | #ifdef CONFIG_TIPC_MEDIA_UDP | |
1112 | if (tipc_udp_mtu_bad(nla_get_u32 | |
1113 | (props[TIPC_NLA_PROP_MTU]))) | |
1114 | return -EINVAL; | |
1115 | b->mtu = nla_get_u32(props[TIPC_NLA_PROP_MTU]); | |
1116 | tipc_node_apply_property(net, b, TIPC_NLA_PROP_MTU); | |
1117 | #endif | |
1118 | } | |
315c00bc | 1119 | } |
315c00bc RA |
1120 | |
1121 | return 0; | |
1122 | } | |
46f15c67 | 1123 | |
93532bb1 YX |
1124 | int tipc_nl_bearer_set(struct sk_buff *skb, struct genl_info *info) |
1125 | { | |
1126 | int err; | |
1127 | ||
1128 | rtnl_lock(); | |
1129 | err = __tipc_nl_bearer_set(skb, info); | |
1130 | rtnl_unlock(); | |
1131 | ||
1132 | return err; | |
1133 | } | |
1134 | ||
d8182804 | 1135 | static int __tipc_nl_add_media(struct tipc_nl_msg *msg, |
f2f67390 | 1136 | struct tipc_media *media, int nlflags) |
46f15c67 RA |
1137 | { |
1138 | void *hdr; | |
1139 | struct nlattr *attrs; | |
1140 | struct nlattr *prop; | |
1141 | ||
bfb3e5dd | 1142 | hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family, |
f2f67390 | 1143 | nlflags, TIPC_NL_MEDIA_GET); |
46f15c67 RA |
1144 | if (!hdr) |
1145 | return -EMSGSIZE; | |
1146 | ||
ae0be8de | 1147 | attrs = nla_nest_start_noflag(msg->skb, TIPC_NLA_MEDIA); |
46f15c67 RA |
1148 | if (!attrs) |
1149 | goto msg_full; | |
1150 | ||
1151 | if (nla_put_string(msg->skb, TIPC_NLA_MEDIA_NAME, media->name)) | |
1152 | goto attr_msg_full; | |
1153 | ||
ae0be8de | 1154 | prop = nla_nest_start_noflag(msg->skb, TIPC_NLA_MEDIA_PROP); |
46f15c67 RA |
1155 | if (!prop) |
1156 | goto prop_msg_full; | |
1157 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, media->priority)) | |
1158 | goto prop_msg_full; | |
1159 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, media->tolerance)) | |
1160 | goto prop_msg_full; | |
16ad3f40 | 1161 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, media->max_win)) |
46f15c67 | 1162 | goto prop_msg_full; |
901271e0 GM |
1163 | if (media->type_id == TIPC_MEDIA_TYPE_UDP) |
1164 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_MTU, media->mtu)) | |
1165 | goto prop_msg_full; | |
46f15c67 RA |
1166 | |
1167 | nla_nest_end(msg->skb, prop); | |
1168 | nla_nest_end(msg->skb, attrs); | |
1169 | genlmsg_end(msg->skb, hdr); | |
1170 | ||
1171 | return 0; | |
1172 | ||
1173 | prop_msg_full: | |
1174 | nla_nest_cancel(msg->skb, prop); | |
1175 | attr_msg_full: | |
1176 | nla_nest_cancel(msg->skb, attrs); | |
1177 | msg_full: | |
1178 | genlmsg_cancel(msg->skb, hdr); | |
1179 | ||
1180 | return -EMSGSIZE; | |
1181 | } | |
1182 | ||
1183 | int tipc_nl_media_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
1184 | { | |
1185 | int err; | |
1186 | int i = cb->args[0]; | |
1187 | struct tipc_nl_msg msg; | |
1188 | ||
1189 | if (i == MAX_MEDIA) | |
1190 | return 0; | |
1191 | ||
1192 | msg.skb = skb; | |
1193 | msg.portid = NETLINK_CB(cb->skb).portid; | |
1194 | msg.seq = cb->nlh->nlmsg_seq; | |
1195 | ||
1196 | rtnl_lock(); | |
1197 | for (; media_info_array[i] != NULL; i++) { | |
f2f67390 ND |
1198 | err = __tipc_nl_add_media(&msg, media_info_array[i], |
1199 | NLM_F_MULTI); | |
46f15c67 RA |
1200 | if (err) |
1201 | break; | |
1202 | } | |
1203 | rtnl_unlock(); | |
1204 | ||
1205 | cb->args[0] = i; | |
1206 | return skb->len; | |
1207 | } | |
1208 | ||
1209 | int tipc_nl_media_get(struct sk_buff *skb, struct genl_info *info) | |
1210 | { | |
1211 | int err; | |
1212 | char *name; | |
1213 | struct tipc_nl_msg msg; | |
1214 | struct tipc_media *media; | |
1215 | struct sk_buff *rep; | |
1216 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
1217 | ||
1218 | if (!info->attrs[TIPC_NLA_MEDIA]) | |
1219 | return -EINVAL; | |
1220 | ||
8cb08174 JB |
1221 | err = nla_parse_nested_deprecated(attrs, TIPC_NLA_MEDIA_MAX, |
1222 | info->attrs[TIPC_NLA_MEDIA], | |
1223 | tipc_nl_media_policy, info->extack); | |
46f15c67 RA |
1224 | if (err) |
1225 | return err; | |
1226 | ||
1227 | if (!attrs[TIPC_NLA_MEDIA_NAME]) | |
1228 | return -EINVAL; | |
1229 | name = nla_data(attrs[TIPC_NLA_MEDIA_NAME]); | |
1230 | ||
1231 | rep = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); | |
1232 | if (!rep) | |
1233 | return -ENOMEM; | |
1234 | ||
1235 | msg.skb = rep; | |
1236 | msg.portid = info->snd_portid; | |
1237 | msg.seq = info->snd_seq; | |
1238 | ||
1239 | rtnl_lock(); | |
1240 | media = tipc_media_find(name); | |
1241 | if (!media) { | |
1242 | err = -EINVAL; | |
1243 | goto err_out; | |
1244 | } | |
1245 | ||
f2f67390 | 1246 | err = __tipc_nl_add_media(&msg, media, 0); |
46f15c67 RA |
1247 | if (err) |
1248 | goto err_out; | |
1249 | rtnl_unlock(); | |
1250 | ||
1251 | return genlmsg_reply(rep, info); | |
1252 | err_out: | |
1253 | rtnl_unlock(); | |
1254 | nlmsg_free(rep); | |
1255 | ||
1256 | return err; | |
1257 | } | |
1e55417d | 1258 | |
07ffb223 | 1259 | int __tipc_nl_media_set(struct sk_buff *skb, struct genl_info *info) |
1e55417d RA |
1260 | { |
1261 | int err; | |
1262 | char *name; | |
1263 | struct tipc_media *m; | |
1264 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
1265 | ||
1266 | if (!info->attrs[TIPC_NLA_MEDIA]) | |
1267 | return -EINVAL; | |
1268 | ||
8cb08174 JB |
1269 | err = nla_parse_nested_deprecated(attrs, TIPC_NLA_MEDIA_MAX, |
1270 | info->attrs[TIPC_NLA_MEDIA], | |
1271 | tipc_nl_media_policy, info->extack); | |
1e55417d RA |
1272 | |
1273 | if (!attrs[TIPC_NLA_MEDIA_NAME]) | |
1274 | return -EINVAL; | |
1275 | name = nla_data(attrs[TIPC_NLA_MEDIA_NAME]); | |
1276 | ||
1e55417d | 1277 | m = tipc_media_find(name); |
07ffb223 | 1278 | if (!m) |
1e55417d | 1279 | return -EINVAL; |
1e55417d RA |
1280 | |
1281 | if (attrs[TIPC_NLA_MEDIA_PROP]) { | |
1282 | struct nlattr *props[TIPC_NLA_PROP_MAX + 1]; | |
1283 | ||
1284 | err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_MEDIA_PROP], | |
1285 | props); | |
07ffb223 | 1286 | if (err) |
1e55417d | 1287 | return err; |
1e55417d RA |
1288 | |
1289 | if (props[TIPC_NLA_PROP_TOL]) | |
1290 | m->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]); | |
1291 | if (props[TIPC_NLA_PROP_PRIO]) | |
1292 | m->priority = nla_get_u32(props[TIPC_NLA_PROP_PRIO]); | |
1293 | if (props[TIPC_NLA_PROP_WIN]) | |
16ad3f40 | 1294 | m->max_win = nla_get_u32(props[TIPC_NLA_PROP_WIN]); |
901271e0 GM |
1295 | if (props[TIPC_NLA_PROP_MTU]) { |
1296 | if (m->type_id != TIPC_MEDIA_TYPE_UDP) | |
1297 | return -EINVAL; | |
1298 | #ifdef CONFIG_TIPC_MEDIA_UDP | |
1299 | if (tipc_udp_mtu_bad(nla_get_u32 | |
1300 | (props[TIPC_NLA_PROP_MTU]))) | |
1301 | return -EINVAL; | |
1302 | m->mtu = nla_get_u32(props[TIPC_NLA_PROP_MTU]); | |
1303 | #endif | |
1304 | } | |
1e55417d | 1305 | } |
1e55417d RA |
1306 | |
1307 | return 0; | |
1308 | } | |
07ffb223 YX |
1309 | |
1310 | int tipc_nl_media_set(struct sk_buff *skb, struct genl_info *info) | |
1311 | { | |
1312 | int err; | |
1313 | ||
1314 | rtnl_lock(); | |
1315 | err = __tipc_nl_media_set(skb, info); | |
1316 | rtnl_unlock(); | |
1317 | ||
1318 | return err; | |
1319 | } |