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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" |
b97bf3fd | 46 | |
a29a194a | 47 | #define MAX_ADDR_STR 60 |
b97bf3fd | 48 | |
ef72a7e0 | 49 | static struct tipc_media * const media_info_array[] = { |
5702dbab JPM |
50 | ð_media_info, |
51 | #ifdef CONFIG_TIPC_MEDIA_IB | |
52 | &ib_media_info, | |
d0f91938 EH |
53 | #endif |
54 | #ifdef CONFIG_TIPC_MEDIA_UDP | |
55 | &udp_media_info, | |
5702dbab JPM |
56 | #endif |
57 | NULL | |
58 | }; | |
b97bf3fd | 59 | |
0d051bf9 JPM |
60 | static struct tipc_bearer *bearer_get(struct net *net, int bearer_id) |
61 | { | |
62 | struct tipc_net *tn = tipc_net(net); | |
63 | ||
64 | return rcu_dereference_rtnl(tn->bearer_list[bearer_id]); | |
65 | } | |
66 | ||
1a90632d | 67 | static void bearer_disable(struct net *net, struct tipc_bearer *b); |
d55c60eb PB |
68 | static int tipc_l2_rcv_msg(struct sk_buff *skb, struct net_device *dev, |
69 | struct packet_type *pt, struct net_device *orig_dev); | |
3a777ff8 | 70 | |
b97bf3fd | 71 | /** |
5c216e1d | 72 | * tipc_media_find - locates specified media object by name |
b97bf3fd | 73 | */ |
358a0d1c | 74 | struct tipc_media *tipc_media_find(const char *name) |
b97bf3fd | 75 | { |
b97bf3fd PL |
76 | u32 i; |
77 | ||
ef72a7e0 JPM |
78 | for (i = 0; media_info_array[i] != NULL; i++) { |
79 | if (!strcmp(media_info_array[i]->name, name)) | |
5702dbab | 80 | break; |
b97bf3fd | 81 | } |
ef72a7e0 | 82 | return media_info_array[i]; |
b97bf3fd PL |
83 | } |
84 | ||
c79be454 AS |
85 | /** |
86 | * media_find_id - locates specified media object by type identifier | |
87 | */ | |
358a0d1c | 88 | static struct tipc_media *media_find_id(u8 type) |
c79be454 AS |
89 | { |
90 | u32 i; | |
91 | ||
ef72a7e0 JPM |
92 | for (i = 0; media_info_array[i] != NULL; i++) { |
93 | if (media_info_array[i]->type_id == type) | |
5702dbab | 94 | break; |
c79be454 | 95 | } |
ef72a7e0 | 96 | return media_info_array[i]; |
b97bf3fd PL |
97 | } |
98 | ||
99 | /** | |
4323add6 | 100 | * tipc_media_addr_printf - record media address in print buffer |
b97bf3fd | 101 | */ |
dc1aed37 | 102 | void tipc_media_addr_printf(char *buf, int len, struct tipc_media_addr *a) |
b97bf3fd | 103 | { |
c61b666e | 104 | char addr_str[MAX_ADDR_STR]; |
1a90632d | 105 | struct tipc_media *m; |
dc1aed37 | 106 | int ret; |
b97bf3fd | 107 | |
1a90632d | 108 | m = media_find_id(a->media_id); |
b97bf3fd | 109 | |
1a90632d JPM |
110 | if (m && !m->addr2str(a, addr_str, sizeof(addr_str))) |
111 | ret = scnprintf(buf, len, "%s(%s)", m->name, addr_str); | |
c61b666e | 112 | else { |
c61b666e | 113 | u32 i; |
b97bf3fd | 114 | |
941787b8 | 115 | ret = scnprintf(buf, len, "UNKNOWN(%u)", a->media_id); |
3d749a6a | 116 | for (i = 0; i < sizeof(a->value); i++) |
941787b8 | 117 | ret += scnprintf(buf - ret, len + ret, |
dc1aed37 | 118 | "-%02x", a->value[i]); |
b97bf3fd PL |
119 | } |
120 | } | |
121 | ||
b97bf3fd PL |
122 | /** |
123 | * bearer_name_validate - validate & (optionally) deconstruct bearer name | |
2c53040f BH |
124 | * @name: ptr to bearer name string |
125 | * @name_parts: ptr to area for bearer name components (or NULL if not needed) | |
c4307285 | 126 | * |
b97bf3fd PL |
127 | * Returns 1 if bearer name is valid, otherwise 0. |
128 | */ | |
c4307285 | 129 | static int bearer_name_validate(const char *name, |
f19765f4 | 130 | struct tipc_bearer_names *name_parts) |
b97bf3fd PL |
131 | { |
132 | char name_copy[TIPC_MAX_BEARER_NAME]; | |
133 | char *media_name; | |
134 | char *if_name; | |
135 | u32 media_len; | |
136 | u32 if_len; | |
137 | ||
138 | /* copy bearer name & ensure length is OK */ | |
b97bf3fd PL |
139 | name_copy[TIPC_MAX_BEARER_NAME - 1] = 0; |
140 | /* need above in case non-Posix strncpy() doesn't pad with nulls */ | |
141 | strncpy(name_copy, name, TIPC_MAX_BEARER_NAME); | |
142 | if (name_copy[TIPC_MAX_BEARER_NAME - 1] != 0) | |
143 | return 0; | |
144 | ||
145 | /* ensure all component parts of bearer name are present */ | |
b97bf3fd | 146 | media_name = name_copy; |
2db9983a AS |
147 | if_name = strchr(media_name, ':'); |
148 | if (if_name == NULL) | |
b97bf3fd PL |
149 | return 0; |
150 | *(if_name++) = 0; | |
151 | media_len = if_name - media_name; | |
152 | if_len = strlen(if_name) + 1; | |
153 | ||
154 | /* validate component parts of bearer name */ | |
c4307285 | 155 | if ((media_len <= 1) || (media_len > TIPC_MAX_MEDIA_NAME) || |
fc073938 | 156 | (if_len <= 1) || (if_len > TIPC_MAX_IF_NAME)) |
b97bf3fd PL |
157 | return 0; |
158 | ||
159 | /* return bearer name components, if necessary */ | |
b97bf3fd PL |
160 | if (name_parts) { |
161 | strcpy(name_parts->media_name, media_name); | |
162 | strcpy(name_parts->if_name, if_name); | |
163 | } | |
164 | return 1; | |
165 | } | |
166 | ||
167 | /** | |
5c216e1d | 168 | * tipc_bearer_find - locates bearer object with matching bearer name |
b97bf3fd | 169 | */ |
7f9f95d9 | 170 | struct tipc_bearer *tipc_bearer_find(struct net *net, const char *name) |
b97bf3fd | 171 | { |
7f9f95d9 | 172 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
1a90632d | 173 | struct tipc_bearer *b; |
b97bf3fd PL |
174 | u32 i; |
175 | ||
3874ccbb | 176 | for (i = 0; i < MAX_BEARERS; i++) { |
1a90632d JPM |
177 | b = rtnl_dereference(tn->bearer_list[i]); |
178 | if (b && (!strcmp(b->name, name))) | |
179 | return b; | |
b97bf3fd | 180 | } |
1fc54d8f | 181 | return NULL; |
b97bf3fd PL |
182 | } |
183 | ||
ff0d3e78 PB |
184 | /* tipc_bearer_get_name - get the bearer name from its id. |
185 | * @net: network namespace | |
186 | * @name: a pointer to the buffer where the name will be stored. | |
187 | * @bearer_id: the id to get the name from. | |
188 | */ | |
189 | int tipc_bearer_get_name(struct net *net, char *name, u32 bearer_id) | |
190 | { | |
191 | struct tipc_net *tn = tipc_net(net); | |
192 | struct tipc_bearer *b; | |
193 | ||
194 | if (bearer_id >= MAX_BEARERS) | |
195 | return -EINVAL; | |
196 | ||
197 | b = rtnl_dereference(tn->bearer_list[bearer_id]); | |
198 | if (!b) | |
199 | return -EINVAL; | |
200 | ||
201 | strcpy(name, b->name); | |
202 | return 0; | |
203 | } | |
204 | ||
7f9f95d9 | 205 | void tipc_bearer_add_dest(struct net *net, u32 bearer_id, u32 dest) |
b97bf3fd | 206 | { |
7f9f95d9 | 207 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
1a90632d | 208 | struct tipc_bearer *b; |
7a2f7d18 YX |
209 | |
210 | rcu_read_lock(); | |
1a90632d JPM |
211 | b = rcu_dereference_rtnl(tn->bearer_list[bearer_id]); |
212 | if (b) | |
b39e465e | 213 | tipc_disc_add_dest(b->disc); |
7a2f7d18 | 214 | rcu_read_unlock(); |
b97bf3fd PL |
215 | } |
216 | ||
7f9f95d9 | 217 | void tipc_bearer_remove_dest(struct net *net, u32 bearer_id, u32 dest) |
b97bf3fd | 218 | { |
7f9f95d9 | 219 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
1a90632d | 220 | struct tipc_bearer *b; |
7a2f7d18 YX |
221 | |
222 | rcu_read_lock(); | |
1a90632d JPM |
223 | b = rcu_dereference_rtnl(tn->bearer_list[bearer_id]); |
224 | if (b) | |
b39e465e | 225 | tipc_disc_remove_dest(b->disc); |
7a2f7d18 | 226 | rcu_read_unlock(); |
b97bf3fd PL |
227 | } |
228 | ||
b97bf3fd PL |
229 | /** |
230 | * tipc_enable_bearer - enable bearer with the given name | |
c4307285 | 231 | */ |
9ab15465 | 232 | static int tipc_enable_bearer(struct net *net, const char *name, |
cb30a633 | 233 | u32 disc_domain, u32 prio, |
d0f91938 | 234 | struct nlattr *attr[]) |
b97bf3fd | 235 | { |
cb30a633 JM |
236 | struct tipc_net *tn = tipc_net(net); |
237 | struct tipc_bearer_names b_names; | |
238 | u32 self = tipc_own_addr(net); | |
239 | int with_this_prio = 1; | |
1a90632d JPM |
240 | struct tipc_bearer *b; |
241 | struct tipc_media *m; | |
4e801fa1 | 242 | struct sk_buff *skb; |
b97bf3fd | 243 | char addr_string[16]; |
cb30a633 | 244 | int bearer_id = 0; |
b97bf3fd | 245 | int res = -EINVAL; |
cb30a633 | 246 | char *errstr = ""; |
b97bf3fd | 247 | |
cb30a633 JM |
248 | if (!self) { |
249 | errstr = "not supported in standalone mode"; | |
250 | res = -ENOPROTOOPT; | |
251 | goto rejected; | |
a10bd924 | 252 | } |
cb30a633 | 253 | |
f19765f4 | 254 | if (!bearer_name_validate(name, &b_names)) { |
cb30a633 JM |
255 | errstr = "illegal name"; |
256 | goto rejected; | |
a10bd924 | 257 | } |
cb30a633 JM |
258 | |
259 | if (tipc_addr_domain_valid(disc_domain) && disc_domain != self) { | |
260 | if (tipc_in_scope(disc_domain, self)) { | |
261 | /* Accept any node in own cluster */ | |
262 | disc_domain = self & TIPC_ZONE_CLUSTER_MASK; | |
263 | res = 0; | |
264 | } else if (in_own_cluster_exact(net, disc_domain)) { | |
265 | /* Accept specified node in own cluster */ | |
266 | res = 0; | |
267 | } | |
66e019a6 AS |
268 | } |
269 | if (res) { | |
cb30a633 JM |
270 | errstr = "illegal discovery domain"; |
271 | goto rejected; | |
a10bd924 | 272 | } |
cb30a633 JM |
273 | |
274 | if (prio > TIPC_MAX_LINK_PRI && prio != TIPC_MEDIA_LINK_PRI) { | |
275 | errstr = "illegal priority"; | |
276 | goto rejected; | |
a10bd924 | 277 | } |
b97bf3fd | 278 | |
1a90632d JPM |
279 | m = tipc_media_find(b_names.media_name); |
280 | if (!m) { | |
cb30a633 JM |
281 | errstr = "media not registered"; |
282 | goto rejected; | |
b97bf3fd | 283 | } |
16cb4b33 | 284 | |
cb30a633 JM |
285 | if (prio == TIPC_MEDIA_LINK_PRI) |
286 | prio = m->priority; | |
b97bf3fd | 287 | |
cb30a633 JM |
288 | /* Check new bearer vs existing ones and find free bearer id if any */ |
289 | while (bearer_id < MAX_BEARERS) { | |
290 | b = rtnl_dereference(tn->bearer_list[bearer_id]); | |
291 | if (!b) | |
292 | break; | |
1a90632d | 293 | if (!strcmp(name, b->name)) { |
cb30a633 JM |
294 | errstr = "already enabled"; |
295 | goto rejected; | |
b97bf3fd | 296 | } |
cb30a633 JM |
297 | bearer_id++; |
298 | if (b->priority != prio) | |
299 | continue; | |
300 | if (++with_this_prio <= 2) | |
301 | continue; | |
302 | pr_warn("Bearer <%s>: already 2 bearers with priority %u\n", | |
303 | name, prio); | |
304 | if (prio == TIPC_MIN_LINK_PRI) { | |
305 | errstr = "cannot adjust to lower"; | |
306 | goto rejected; | |
b97bf3fd | 307 | } |
cb30a633 JM |
308 | pr_warn("Bearer <%s>: trying with adjusted priority\n", name); |
309 | prio--; | |
310 | bearer_id = 0; | |
311 | with_this_prio = 1; | |
b97bf3fd | 312 | } |
cb30a633 | 313 | |
b97bf3fd | 314 | if (bearer_id >= MAX_BEARERS) { |
cb30a633 JM |
315 | errstr = "max 3 bearers permitted"; |
316 | goto rejected; | |
b97bf3fd PL |
317 | } |
318 | ||
1a90632d JPM |
319 | b = kzalloc(sizeof(*b), GFP_ATOMIC); |
320 | if (!b) | |
7216cd94 YX |
321 | return -ENOMEM; |
322 | ||
1a90632d JPM |
323 | strcpy(b->name, name); |
324 | b->media = m; | |
325 | res = m->enable_media(net, b, attr); | |
b97bf3fd | 326 | if (res) { |
19142551 | 327 | kfree(b); |
cb30a633 JM |
328 | errstr = "failed to enable media"; |
329 | goto rejected; | |
b97bf3fd PL |
330 | } |
331 | ||
1a90632d JPM |
332 | b->identity = bearer_id; |
333 | b->tolerance = m->tolerance; | |
334 | b->window = m->window; | |
335 | b->domain = disc_domain; | |
336 | b->net_plane = bearer_id + 'A'; | |
cb30a633 | 337 | b->priority = prio; |
0d051bf9 | 338 | test_and_set_bit_lock(0, &b->up); |
3a777ff8 | 339 | |
4e801fa1 | 340 | res = tipc_disc_create(net, b, &b->bcast_addr, &skb); |
3a777ff8 | 341 | if (res) { |
1a90632d | 342 | bearer_disable(net, b); |
cb30a633 JM |
343 | kfree(b); |
344 | errstr = "failed to create discoverer"; | |
345 | goto rejected; | |
3a777ff8 | 346 | } |
3874ccbb | 347 | |
1a90632d | 348 | rcu_assign_pointer(tn->bearer_list[bearer_id], b); |
4e801fa1 JPM |
349 | if (skb) |
350 | tipc_bearer_xmit_skb(net, bearer_id, skb, &b->bcast_addr); | |
35c55c98 | 351 | |
19142551 TR |
352 | if (tipc_mon_create(net, bearer_id)) { |
353 | bearer_disable(net, b); | |
35c55c98 | 354 | return -ENOMEM; |
19142551 | 355 | } |
35c55c98 | 356 | |
cb30a633 JM |
357 | tipc_addr_string_fill(addr_string, disc_domain); |
358 | pr_info("Enabled bearer <%s>, discovery scope %s, priority %u\n", | |
359 | name, addr_string, prio); | |
360 | return res; | |
361 | rejected: | |
362 | pr_warn("Bearer <%s> rejected, %s\n", name, errstr); | |
b97bf3fd PL |
363 | return res; |
364 | } | |
365 | ||
366 | /** | |
512137ee | 367 | * tipc_reset_bearer - Reset all links established over this bearer |
b97bf3fd | 368 | */ |
1a90632d | 369 | static int tipc_reset_bearer(struct net *net, struct tipc_bearer *b) |
b97bf3fd | 370 | { |
1a90632d JPM |
371 | pr_info("Resetting bearer <%s>\n", b->name); |
372 | tipc_node_delete_links(net, b->identity); | |
373 | tipc_disc_reset(net, b); | |
0e35fd5e | 374 | return 0; |
b97bf3fd PL |
375 | } |
376 | ||
377 | /** | |
617d3c7a | 378 | * bearer_disable |
c4307285 | 379 | * |
7216cd94 | 380 | * Note: This routine assumes caller holds RTNL lock. |
b97bf3fd | 381 | */ |
1a90632d | 382 | static void bearer_disable(struct net *net, struct tipc_bearer *b) |
b97bf3fd | 383 | { |
5b7066c3 JPM |
384 | struct tipc_net *tn = tipc_net(net); |
385 | int bearer_id = b->identity; | |
3874ccbb | 386 | |
1a90632d | 387 | pr_info("Disabling bearer <%s>\n", b->name); |
0d051bf9 | 388 | clear_bit_unlock(0, &b->up); |
5b7066c3 | 389 | tipc_node_delete_links(net, bearer_id); |
0d051bf9 | 390 | b->media->disable_media(b); |
1a90632d | 391 | RCU_INIT_POINTER(b->media_ptr, NULL); |
b39e465e JM |
392 | if (b->disc) |
393 | tipc_disc_delete(b->disc); | |
5b7066c3 | 394 | RCU_INIT_POINTER(tn->bearer_list[bearer_id], NULL); |
1a90632d | 395 | kfree_rcu(b, rcu); |
35c55c98 | 396 | tipc_mon_delete(net, bearer_id); |
b97bf3fd PL |
397 | } |
398 | ||
d0f91938 EH |
399 | int tipc_enable_l2_media(struct net *net, struct tipc_bearer *b, |
400 | struct nlattr *attr[]) | |
e4d050cb YX |
401 | { |
402 | struct net_device *dev; | |
403 | char *driver_name = strchr((const char *)b->name, ':') + 1; | |
404 | ||
405 | /* Find device with specified name */ | |
7f9f95d9 | 406 | dev = dev_get_by_name(net, driver_name); |
e4d050cb YX |
407 | if (!dev) |
408 | return -ENODEV; | |
3de81b75 MK |
409 | if (tipc_mtu_bad(dev, 0)) { |
410 | dev_put(dev); | |
411 | return -EINVAL; | |
412 | } | |
e4d050cb | 413 | |
38504c28 | 414 | /* Associate TIPC bearer with L2 bearer */ |
2231c5af | 415 | rcu_assign_pointer(b->media_ptr, dev); |
d55c60eb PB |
416 | b->pt.dev = dev; |
417 | b->pt.type = htons(ETH_P_TIPC); | |
418 | b->pt.func = tipc_l2_rcv_msg; | |
419 | dev_add_pack(&b->pt); | |
38504c28 | 420 | memset(&b->bcast_addr, 0, sizeof(b->bcast_addr)); |
e4d050cb YX |
421 | memcpy(b->bcast_addr.value, dev->broadcast, b->media->hwaddr_len); |
422 | b->bcast_addr.media_id = b->media->type_id; | |
9999974a | 423 | b->bcast_addr.broadcast = TIPC_BROADCAST_SUPPORT; |
e4d050cb | 424 | b->mtu = dev->mtu; |
38504c28 | 425 | b->media->raw2addr(b, &b->addr, (char *)dev->dev_addr); |
e4d050cb YX |
426 | rcu_assign_pointer(dev->tipc_ptr, b); |
427 | return 0; | |
428 | } | |
429 | ||
38504c28 | 430 | /* tipc_disable_l2_media - detach TIPC bearer from an L2 interface |
e4d050cb | 431 | * |
282b3a05 | 432 | * Mark L2 bearer as inactive so that incoming buffers are thrown away |
e4d050cb YX |
433 | */ |
434 | void tipc_disable_l2_media(struct tipc_bearer *b) | |
435 | { | |
2231c5af YX |
436 | struct net_device *dev; |
437 | ||
438 | dev = (struct net_device *)rtnl_dereference(b->media_ptr); | |
d55c60eb | 439 | dev_remove_pack(&b->pt); |
e4d050cb | 440 | RCU_INIT_POINTER(dev->tipc_ptr, NULL); |
f1c8d8cb | 441 | synchronize_net(); |
e4d050cb YX |
442 | dev_put(dev); |
443 | } | |
444 | ||
445 | /** | |
38504c28 | 446 | * tipc_l2_send_msg - send a TIPC packet out over an L2 interface |
5b7066c3 | 447 | * @skb: the packet to be sent |
1a90632d | 448 | * @b: the bearer through which the packet is to be sent |
e4d050cb YX |
449 | * @dest: peer destination address |
450 | */ | |
7214bcf8 | 451 | int tipc_l2_send_msg(struct net *net, struct sk_buff *skb, |
1da46568 | 452 | struct tipc_bearer *b, struct tipc_media_addr *dest) |
e4d050cb | 453 | { |
2231c5af | 454 | struct net_device *dev; |
e4d050cb | 455 | int delta; |
2231c5af YX |
456 | |
457 | dev = (struct net_device *)rcu_dereference_rtnl(b->media_ptr); | |
458 | if (!dev) | |
459 | return 0; | |
e4d050cb | 460 | |
0d051bf9 JPM |
461 | delta = SKB_DATA_ALIGN(dev->hard_header_len - skb_headroom(skb)); |
462 | if ((delta > 0) && pskb_expand_head(skb, delta, 0, GFP_ATOMIC)) { | |
463 | kfree_skb(skb); | |
464 | return 0; | |
465 | } | |
7214bcf8 JPM |
466 | skb_reset_network_header(skb); |
467 | skb->dev = dev; | |
468 | skb->protocol = htons(ETH_P_TIPC); | |
469 | dev_hard_header(skb, dev, ETH_P_TIPC, dest->value, | |
470 | dev->dev_addr, skb->len); | |
471 | dev_queue_xmit(skb); | |
e4d050cb YX |
472 | return 0; |
473 | } | |
474 | ||
9999974a JPM |
475 | bool tipc_bearer_bcast_support(struct net *net, u32 bearer_id) |
476 | { | |
477 | bool supp = false; | |
478 | struct tipc_bearer *b; | |
479 | ||
480 | rcu_read_lock(); | |
481 | b = bearer_get(net, bearer_id); | |
482 | if (b) | |
483 | supp = (b->bcast_addr.broadcast == TIPC_BROADCAST_SUPPORT); | |
484 | rcu_read_unlock(); | |
485 | return supp; | |
486 | } | |
487 | ||
959e1781 JPM |
488 | int tipc_bearer_mtu(struct net *net, u32 bearer_id) |
489 | { | |
490 | int mtu = 0; | |
491 | struct tipc_bearer *b; | |
492 | ||
493 | rcu_read_lock(); | |
494 | b = rcu_dereference_rtnl(tipc_net(net)->bearer_list[bearer_id]); | |
495 | if (b) | |
496 | mtu = b->mtu; | |
497 | rcu_read_unlock(); | |
498 | return mtu; | |
499 | } | |
500 | ||
60852d67 JPM |
501 | /* tipc_bearer_xmit_skb - sends buffer to destination over bearer |
502 | */ | |
503 | void tipc_bearer_xmit_skb(struct net *net, u32 bearer_id, | |
504 | struct sk_buff *skb, | |
505 | struct tipc_media_addr *dest) | |
506 | { | |
0d051bf9 | 507 | struct tipc_msg *hdr = buf_msg(skb); |
60852d67 JPM |
508 | struct tipc_bearer *b; |
509 | ||
510 | rcu_read_lock(); | |
0d051bf9 JPM |
511 | b = bearer_get(net, bearer_id); |
512 | if (likely(b && (test_bit(0, &b->up) || msg_is_reset(hdr)))) | |
60852d67 | 513 | b->media->send_msg(net, skb, b, dest); |
4e801fa1 JPM |
514 | else |
515 | kfree_skb(skb); | |
60852d67 | 516 | rcu_read_unlock(); |
60852d67 JPM |
517 | } |
518 | ||
af9b028e JPM |
519 | /* tipc_bearer_xmit() -send buffer to destination over bearer |
520 | */ | |
521 | void tipc_bearer_xmit(struct net *net, u32 bearer_id, | |
522 | struct sk_buff_head *xmitq, | |
523 | struct tipc_media_addr *dst) | |
524 | { | |
af9b028e JPM |
525 | struct tipc_bearer *b; |
526 | struct sk_buff *skb, *tmp; | |
527 | ||
528 | if (skb_queue_empty(xmitq)) | |
529 | return; | |
530 | ||
531 | rcu_read_lock(); | |
0d051bf9 | 532 | b = bearer_get(net, bearer_id); |
4e801fa1 JPM |
533 | if (unlikely(!b)) |
534 | __skb_queue_purge(xmitq); | |
535 | skb_queue_walk_safe(xmitq, skb, tmp) { | |
536 | __skb_dequeue(xmitq); | |
0d051bf9 JPM |
537 | if (likely(test_bit(0, &b->up) || msg_is_reset(buf_msg(skb)))) |
538 | b->media->send_msg(net, skb, b, dst); | |
539 | else | |
5128b185 | 540 | kfree_skb(skb); |
b06b281e JPM |
541 | } |
542 | rcu_read_unlock(); | |
543 | } | |
544 | ||
545 | /* tipc_bearer_bc_xmit() - broadcast buffers to all destinations | |
546 | */ | |
547 | void tipc_bearer_bc_xmit(struct net *net, u32 bearer_id, | |
548 | struct sk_buff_head *xmitq) | |
549 | { | |
550 | struct tipc_net *tn = tipc_net(net); | |
551 | int net_id = tn->net_id; | |
552 | struct tipc_bearer *b; | |
553 | struct sk_buff *skb, *tmp; | |
554 | struct tipc_msg *hdr; | |
555 | ||
556 | rcu_read_lock(); | |
0d051bf9 JPM |
557 | b = bearer_get(net, bearer_id); |
558 | if (unlikely(!b || !test_bit(0, &b->up))) | |
4e801fa1 JPM |
559 | __skb_queue_purge(xmitq); |
560 | skb_queue_walk_safe(xmitq, skb, tmp) { | |
561 | hdr = buf_msg(skb); | |
562 | msg_set_non_seq(hdr, 1); | |
563 | msg_set_mc_netid(hdr, net_id); | |
564 | __skb_dequeue(xmitq); | |
565 | b->media->send_msg(net, skb, b, &b->bcast_addr); | |
af9b028e JPM |
566 | } |
567 | rcu_read_unlock(); | |
568 | } | |
569 | ||
6e967adf YX |
570 | /** |
571 | * tipc_l2_rcv_msg - handle incoming TIPC message from an interface | |
572 | * @buf: the received packet | |
573 | * @dev: the net device that the packet was received on | |
574 | * @pt: the packet_type structure which was used to register this handler | |
575 | * @orig_dev: the original receive net device in case the device is a bond | |
576 | * | |
577 | * Accept only packets explicitly sent to this node, or broadcast packets; | |
578 | * ignores packets sent using interface multicast, and traffic sent to other | |
579 | * nodes (which can happen if interface is running in promiscuous mode). | |
580 | */ | |
4e801fa1 | 581 | static int tipc_l2_rcv_msg(struct sk_buff *skb, struct net_device *dev, |
6e967adf YX |
582 | struct packet_type *pt, struct net_device *orig_dev) |
583 | { | |
1a90632d | 584 | struct tipc_bearer *b; |
6e967adf | 585 | |
6e967adf | 586 | rcu_read_lock(); |
d55c60eb PB |
587 | b = rcu_dereference_rtnl(dev->tipc_ptr) ?: |
588 | rcu_dereference_rtnl(orig_dev->tipc_ptr); | |
0d051bf9 | 589 | if (likely(b && test_bit(0, &b->up) && |
fed5f571 | 590 | (skb->pkt_type <= PACKET_MULTICAST))) { |
4e801fa1 | 591 | skb->next = NULL; |
d55c60eb | 592 | tipc_rcv(dev_net(b->pt.dev), skb, b); |
4e801fa1 JPM |
593 | rcu_read_unlock(); |
594 | return NET_RX_SUCCESS; | |
6e967adf YX |
595 | } |
596 | rcu_read_unlock(); | |
4e801fa1 | 597 | kfree_skb(skb); |
6e967adf YX |
598 | return NET_RX_DROP; |
599 | } | |
600 | ||
601 | /** | |
602 | * tipc_l2_device_event - handle device events from network device | |
603 | * @nb: the context of the notification | |
604 | * @evt: the type of event | |
605 | * @ptr: the net device that the event was on | |
606 | * | |
607 | * This function is called by the Ethernet driver in case of link | |
608 | * change event. | |
609 | */ | |
610 | static int tipc_l2_device_event(struct notifier_block *nb, unsigned long evt, | |
611 | void *ptr) | |
612 | { | |
6e967adf | 613 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
c93d3baa | 614 | struct net *net = dev_net(dev); |
1a90632d | 615 | struct tipc_bearer *b; |
6e967adf | 616 | |
1a90632d JPM |
617 | b = rtnl_dereference(dev->tipc_ptr); |
618 | if (!b) | |
6e967adf | 619 | return NOTIFY_DONE; |
6e967adf | 620 | |
6e967adf YX |
621 | switch (evt) { |
622 | case NETDEV_CHANGE: | |
623 | if (netif_carrier_ok(dev)) | |
624 | break; | |
5b7066c3 | 625 | case NETDEV_UP: |
0d051bf9 | 626 | test_and_set_bit_lock(0, &b->up); |
5b7066c3 | 627 | break; |
282b3a05 | 628 | case NETDEV_GOING_DOWN: |
0d051bf9 | 629 | clear_bit_unlock(0, &b->up); |
5b7066c3 JPM |
630 | tipc_reset_bearer(net, b); |
631 | break; | |
6e967adf | 632 | case NETDEV_CHANGEMTU: |
3de81b75 MK |
633 | if (tipc_mtu_bad(dev, 0)) { |
634 | bearer_disable(net, b); | |
635 | break; | |
636 | } | |
637 | b->mtu = dev->mtu; | |
1a90632d | 638 | tipc_reset_bearer(net, b); |
a21a584d | 639 | break; |
6e967adf | 640 | case NETDEV_CHANGEADDR: |
1a90632d | 641 | b->media->raw2addr(b, &b->addr, |
5b7066c3 | 642 | (char *)dev->dev_addr); |
1a90632d | 643 | tipc_reset_bearer(net, b); |
6e967adf YX |
644 | break; |
645 | case NETDEV_UNREGISTER: | |
646 | case NETDEV_CHANGENAME: | |
8e0deed9 | 647 | bearer_disable(net, b); |
6e967adf YX |
648 | break; |
649 | } | |
6e967adf YX |
650 | return NOTIFY_OK; |
651 | } | |
652 | ||
6e967adf YX |
653 | static struct notifier_block notifier = { |
654 | .notifier_call = tipc_l2_device_event, | |
655 | .priority = 0, | |
656 | }; | |
657 | ||
658 | int tipc_bearer_setup(void) | |
659 | { | |
d55c60eb | 660 | return register_netdevice_notifier(¬ifier); |
6e967adf YX |
661 | } |
662 | ||
663 | void tipc_bearer_cleanup(void) | |
664 | { | |
665 | unregister_netdevice_notifier(¬ifier); | |
6e967adf | 666 | } |
b97bf3fd | 667 | |
f2f9800d | 668 | void tipc_bearer_stop(struct net *net) |
b97bf3fd | 669 | { |
7f9f95d9 | 670 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
1a90632d | 671 | struct tipc_bearer *b; |
b97bf3fd PL |
672 | u32 i; |
673 | ||
b97bf3fd | 674 | for (i = 0; i < MAX_BEARERS; i++) { |
1a90632d JPM |
675 | b = rtnl_dereference(tn->bearer_list[i]); |
676 | if (b) { | |
677 | bearer_disable(net, b); | |
7f9f95d9 | 678 | tn->bearer_list[i] = NULL; |
3874ccbb | 679 | } |
b97bf3fd | 680 | } |
b97bf3fd | 681 | } |
0655f6a8 | 682 | |
35b9dd76 | 683 | /* Caller should hold rtnl_lock to protect the bearer */ |
d8182804 | 684 | static int __tipc_nl_add_bearer(struct tipc_nl_msg *msg, |
f2f67390 | 685 | struct tipc_bearer *bearer, int nlflags) |
35b9dd76 RA |
686 | { |
687 | void *hdr; | |
688 | struct nlattr *attrs; | |
689 | struct nlattr *prop; | |
690 | ||
bfb3e5dd | 691 | hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family, |
f2f67390 | 692 | nlflags, TIPC_NL_BEARER_GET); |
35b9dd76 RA |
693 | if (!hdr) |
694 | return -EMSGSIZE; | |
695 | ||
696 | attrs = nla_nest_start(msg->skb, TIPC_NLA_BEARER); | |
697 | if (!attrs) | |
698 | goto msg_full; | |
699 | ||
700 | if (nla_put_string(msg->skb, TIPC_NLA_BEARER_NAME, bearer->name)) | |
701 | goto attr_msg_full; | |
702 | ||
703 | prop = nla_nest_start(msg->skb, TIPC_NLA_BEARER_PROP); | |
704 | if (!prop) | |
705 | goto prop_msg_full; | |
706 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, bearer->priority)) | |
707 | goto prop_msg_full; | |
708 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, bearer->tolerance)) | |
709 | goto prop_msg_full; | |
710 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, bearer->window)) | |
711 | goto prop_msg_full; | |
712 | ||
713 | nla_nest_end(msg->skb, prop); | |
fdb3accc RA |
714 | |
715 | #ifdef CONFIG_TIPC_MEDIA_UDP | |
716 | if (bearer->media->type_id == TIPC_MEDIA_TYPE_UDP) { | |
717 | if (tipc_udp_nl_add_bearer_data(msg, bearer)) | |
718 | goto attr_msg_full; | |
719 | } | |
720 | #endif | |
721 | ||
35b9dd76 RA |
722 | nla_nest_end(msg->skb, attrs); |
723 | genlmsg_end(msg->skb, hdr); | |
724 | ||
725 | return 0; | |
726 | ||
727 | prop_msg_full: | |
728 | nla_nest_cancel(msg->skb, prop); | |
729 | attr_msg_full: | |
730 | nla_nest_cancel(msg->skb, attrs); | |
731 | msg_full: | |
732 | genlmsg_cancel(msg->skb, hdr); | |
733 | ||
734 | return -EMSGSIZE; | |
735 | } | |
736 | ||
737 | int tipc_nl_bearer_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
738 | { | |
739 | int err; | |
740 | int i = cb->args[0]; | |
741 | struct tipc_bearer *bearer; | |
742 | struct tipc_nl_msg msg; | |
7f9f95d9 YX |
743 | struct net *net = sock_net(skb->sk); |
744 | struct tipc_net *tn = net_generic(net, tipc_net_id); | |
35b9dd76 RA |
745 | |
746 | if (i == MAX_BEARERS) | |
747 | return 0; | |
748 | ||
749 | msg.skb = skb; | |
750 | msg.portid = NETLINK_CB(cb->skb).portid; | |
751 | msg.seq = cb->nlh->nlmsg_seq; | |
752 | ||
753 | rtnl_lock(); | |
754 | for (i = 0; i < MAX_BEARERS; i++) { | |
7f9f95d9 | 755 | bearer = rtnl_dereference(tn->bearer_list[i]); |
35b9dd76 RA |
756 | if (!bearer) |
757 | continue; | |
758 | ||
f2f67390 | 759 | err = __tipc_nl_add_bearer(&msg, bearer, NLM_F_MULTI); |
35b9dd76 RA |
760 | if (err) |
761 | break; | |
762 | } | |
763 | rtnl_unlock(); | |
764 | ||
765 | cb->args[0] = i; | |
766 | return skb->len; | |
767 | } | |
768 | ||
769 | int tipc_nl_bearer_get(struct sk_buff *skb, struct genl_info *info) | |
770 | { | |
771 | int err; | |
772 | char *name; | |
773 | struct sk_buff *rep; | |
774 | struct tipc_bearer *bearer; | |
775 | struct tipc_nl_msg msg; | |
776 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
7f9f95d9 | 777 | struct net *net = genl_info_net(info); |
35b9dd76 RA |
778 | |
779 | if (!info->attrs[TIPC_NLA_BEARER]) | |
780 | return -EINVAL; | |
781 | ||
782 | err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX, | |
783 | info->attrs[TIPC_NLA_BEARER], | |
fe52145f | 784 | tipc_nl_bearer_policy, info->extack); |
35b9dd76 RA |
785 | if (err) |
786 | return err; | |
787 | ||
788 | if (!attrs[TIPC_NLA_BEARER_NAME]) | |
789 | return -EINVAL; | |
790 | name = nla_data(attrs[TIPC_NLA_BEARER_NAME]); | |
791 | ||
792 | rep = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); | |
793 | if (!rep) | |
794 | return -ENOMEM; | |
795 | ||
796 | msg.skb = rep; | |
797 | msg.portid = info->snd_portid; | |
798 | msg.seq = info->snd_seq; | |
799 | ||
800 | rtnl_lock(); | |
7f9f95d9 | 801 | bearer = tipc_bearer_find(net, name); |
35b9dd76 RA |
802 | if (!bearer) { |
803 | err = -EINVAL; | |
804 | goto err_out; | |
805 | } | |
806 | ||
f2f67390 | 807 | err = __tipc_nl_add_bearer(&msg, bearer, 0); |
35b9dd76 RA |
808 | if (err) |
809 | goto err_out; | |
810 | rtnl_unlock(); | |
811 | ||
812 | return genlmsg_reply(rep, info); | |
813 | err_out: | |
814 | rtnl_unlock(); | |
815 | nlmsg_free(rep); | |
816 | ||
817 | return err; | |
818 | } | |
819 | ||
d59d8b77 | 820 | int __tipc_nl_bearer_disable(struct sk_buff *skb, struct genl_info *info) |
0655f6a8 RA |
821 | { |
822 | int err; | |
823 | char *name; | |
824 | struct tipc_bearer *bearer; | |
825 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
9ab15465 | 826 | struct net *net = sock_net(skb->sk); |
0655f6a8 RA |
827 | |
828 | if (!info->attrs[TIPC_NLA_BEARER]) | |
829 | return -EINVAL; | |
830 | ||
831 | err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX, | |
832 | info->attrs[TIPC_NLA_BEARER], | |
fe52145f | 833 | tipc_nl_bearer_policy, info->extack); |
0655f6a8 RA |
834 | if (err) |
835 | return err; | |
836 | ||
837 | if (!attrs[TIPC_NLA_BEARER_NAME]) | |
838 | return -EINVAL; | |
839 | ||
840 | name = nla_data(attrs[TIPC_NLA_BEARER_NAME]); | |
841 | ||
7f9f95d9 | 842 | bearer = tipc_bearer_find(net, name); |
d59d8b77 | 843 | if (!bearer) |
0655f6a8 | 844 | return -EINVAL; |
0655f6a8 | 845 | |
b1c29f6b | 846 | bearer_disable(net, bearer); |
0655f6a8 RA |
847 | |
848 | return 0; | |
849 | } | |
850 | ||
d59d8b77 YX |
851 | int tipc_nl_bearer_disable(struct sk_buff *skb, struct genl_info *info) |
852 | { | |
853 | int err; | |
854 | ||
855 | rtnl_lock(); | |
856 | err = __tipc_nl_bearer_disable(skb, info); | |
857 | rtnl_unlock(); | |
858 | ||
859 | return err; | |
860 | } | |
861 | ||
45cf7edf | 862 | int __tipc_nl_bearer_enable(struct sk_buff *skb, struct genl_info *info) |
0655f6a8 RA |
863 | { |
864 | int err; | |
865 | char *bearer; | |
866 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
9ab15465 RA |
867 | struct net *net = sock_net(skb->sk); |
868 | struct tipc_net *tn = net_generic(net, tipc_net_id); | |
0655f6a8 RA |
869 | u32 domain; |
870 | u32 prio; | |
871 | ||
872 | prio = TIPC_MEDIA_LINK_PRI; | |
9ff26e9f | 873 | domain = tn->own_addr & TIPC_ZONE_CLUSTER_MASK; |
0655f6a8 RA |
874 | |
875 | if (!info->attrs[TIPC_NLA_BEARER]) | |
876 | return -EINVAL; | |
877 | ||
878 | err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX, | |
879 | info->attrs[TIPC_NLA_BEARER], | |
fe52145f | 880 | tipc_nl_bearer_policy, info->extack); |
0655f6a8 RA |
881 | if (err) |
882 | return err; | |
883 | ||
884 | if (!attrs[TIPC_NLA_BEARER_NAME]) | |
885 | return -EINVAL; | |
886 | ||
887 | bearer = nla_data(attrs[TIPC_NLA_BEARER_NAME]); | |
888 | ||
889 | if (attrs[TIPC_NLA_BEARER_DOMAIN]) | |
890 | domain = nla_get_u32(attrs[TIPC_NLA_BEARER_DOMAIN]); | |
891 | ||
892 | if (attrs[TIPC_NLA_BEARER_PROP]) { | |
893 | struct nlattr *props[TIPC_NLA_PROP_MAX + 1]; | |
894 | ||
895 | err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_BEARER_PROP], | |
896 | props); | |
897 | if (err) | |
898 | return err; | |
899 | ||
900 | if (props[TIPC_NLA_PROP_PRIO]) | |
901 | prio = nla_get_u32(props[TIPC_NLA_PROP_PRIO]); | |
902 | } | |
903 | ||
45cf7edf YX |
904 | return tipc_enable_bearer(net, bearer, domain, prio, attrs); |
905 | } | |
906 | ||
907 | int tipc_nl_bearer_enable(struct sk_buff *skb, struct genl_info *info) | |
908 | { | |
909 | int err; | |
910 | ||
0655f6a8 | 911 | rtnl_lock(); |
45cf7edf | 912 | err = __tipc_nl_bearer_enable(skb, info); |
0655f6a8 RA |
913 | rtnl_unlock(); |
914 | ||
45cf7edf | 915 | return err; |
0655f6a8 | 916 | } |
315c00bc | 917 | |
ef20cd4d RA |
918 | int tipc_nl_bearer_add(struct sk_buff *skb, struct genl_info *info) |
919 | { | |
920 | int err; | |
921 | char *name; | |
922 | struct tipc_bearer *b; | |
923 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
924 | struct net *net = sock_net(skb->sk); | |
925 | ||
926 | if (!info->attrs[TIPC_NLA_BEARER]) | |
927 | return -EINVAL; | |
928 | ||
929 | err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX, | |
930 | info->attrs[TIPC_NLA_BEARER], | |
fe52145f | 931 | tipc_nl_bearer_policy, info->extack); |
ef20cd4d RA |
932 | if (err) |
933 | return err; | |
934 | ||
935 | if (!attrs[TIPC_NLA_BEARER_NAME]) | |
936 | return -EINVAL; | |
937 | name = nla_data(attrs[TIPC_NLA_BEARER_NAME]); | |
938 | ||
939 | rtnl_lock(); | |
940 | b = tipc_bearer_find(net, name); | |
941 | if (!b) { | |
942 | rtnl_unlock(); | |
943 | return -EINVAL; | |
944 | } | |
945 | ||
946 | #ifdef CONFIG_TIPC_MEDIA_UDP | |
947 | if (attrs[TIPC_NLA_BEARER_UDP_OPTS]) { | |
948 | err = tipc_udp_nl_bearer_add(b, | |
949 | attrs[TIPC_NLA_BEARER_UDP_OPTS]); | |
950 | if (err) { | |
951 | rtnl_unlock(); | |
952 | return err; | |
953 | } | |
954 | } | |
955 | #endif | |
956 | rtnl_unlock(); | |
957 | ||
958 | return 0; | |
959 | } | |
960 | ||
93532bb1 | 961 | int __tipc_nl_bearer_set(struct sk_buff *skb, struct genl_info *info) |
315c00bc | 962 | { |
315c00bc RA |
963 | struct tipc_bearer *b; |
964 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
c3d6fb85 | 965 | struct net *net = sock_net(skb->sk); |
37c64cf6 JM |
966 | char *name; |
967 | int err; | |
315c00bc RA |
968 | |
969 | if (!info->attrs[TIPC_NLA_BEARER]) | |
970 | return -EINVAL; | |
971 | ||
972 | err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX, | |
973 | info->attrs[TIPC_NLA_BEARER], | |
fe52145f | 974 | tipc_nl_bearer_policy, info->extack); |
315c00bc RA |
975 | if (err) |
976 | return err; | |
977 | ||
978 | if (!attrs[TIPC_NLA_BEARER_NAME]) | |
979 | return -EINVAL; | |
980 | name = nla_data(attrs[TIPC_NLA_BEARER_NAME]); | |
981 | ||
7f9f95d9 | 982 | b = tipc_bearer_find(net, name); |
93532bb1 | 983 | if (!b) |
315c00bc | 984 | return -EINVAL; |
315c00bc RA |
985 | |
986 | if (attrs[TIPC_NLA_BEARER_PROP]) { | |
987 | struct nlattr *props[TIPC_NLA_PROP_MAX + 1]; | |
988 | ||
989 | err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_BEARER_PROP], | |
990 | props); | |
93532bb1 | 991 | if (err) |
315c00bc | 992 | return err; |
315c00bc | 993 | |
37c64cf6 | 994 | if (props[TIPC_NLA_PROP_TOL]) { |
315c00bc | 995 | b->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]); |
37c64cf6 JM |
996 | tipc_node_apply_tolerance(net, b); |
997 | } | |
315c00bc RA |
998 | if (props[TIPC_NLA_PROP_PRIO]) |
999 | b->priority = nla_get_u32(props[TIPC_NLA_PROP_PRIO]); | |
1000 | if (props[TIPC_NLA_PROP_WIN]) | |
1001 | b->window = nla_get_u32(props[TIPC_NLA_PROP_WIN]); | |
1002 | } | |
315c00bc RA |
1003 | |
1004 | return 0; | |
1005 | } | |
46f15c67 | 1006 | |
93532bb1 YX |
1007 | int tipc_nl_bearer_set(struct sk_buff *skb, struct genl_info *info) |
1008 | { | |
1009 | int err; | |
1010 | ||
1011 | rtnl_lock(); | |
1012 | err = __tipc_nl_bearer_set(skb, info); | |
1013 | rtnl_unlock(); | |
1014 | ||
1015 | return err; | |
1016 | } | |
1017 | ||
d8182804 | 1018 | static int __tipc_nl_add_media(struct tipc_nl_msg *msg, |
f2f67390 | 1019 | struct tipc_media *media, int nlflags) |
46f15c67 RA |
1020 | { |
1021 | void *hdr; | |
1022 | struct nlattr *attrs; | |
1023 | struct nlattr *prop; | |
1024 | ||
bfb3e5dd | 1025 | hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family, |
f2f67390 | 1026 | nlflags, TIPC_NL_MEDIA_GET); |
46f15c67 RA |
1027 | if (!hdr) |
1028 | return -EMSGSIZE; | |
1029 | ||
1030 | attrs = nla_nest_start(msg->skb, TIPC_NLA_MEDIA); | |
1031 | if (!attrs) | |
1032 | goto msg_full; | |
1033 | ||
1034 | if (nla_put_string(msg->skb, TIPC_NLA_MEDIA_NAME, media->name)) | |
1035 | goto attr_msg_full; | |
1036 | ||
1037 | prop = nla_nest_start(msg->skb, TIPC_NLA_MEDIA_PROP); | |
1038 | if (!prop) | |
1039 | goto prop_msg_full; | |
1040 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, media->priority)) | |
1041 | goto prop_msg_full; | |
1042 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, media->tolerance)) | |
1043 | goto prop_msg_full; | |
1044 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, media->window)) | |
1045 | goto prop_msg_full; | |
1046 | ||
1047 | nla_nest_end(msg->skb, prop); | |
1048 | nla_nest_end(msg->skb, attrs); | |
1049 | genlmsg_end(msg->skb, hdr); | |
1050 | ||
1051 | return 0; | |
1052 | ||
1053 | prop_msg_full: | |
1054 | nla_nest_cancel(msg->skb, prop); | |
1055 | attr_msg_full: | |
1056 | nla_nest_cancel(msg->skb, attrs); | |
1057 | msg_full: | |
1058 | genlmsg_cancel(msg->skb, hdr); | |
1059 | ||
1060 | return -EMSGSIZE; | |
1061 | } | |
1062 | ||
1063 | int tipc_nl_media_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
1064 | { | |
1065 | int err; | |
1066 | int i = cb->args[0]; | |
1067 | struct tipc_nl_msg msg; | |
1068 | ||
1069 | if (i == MAX_MEDIA) | |
1070 | return 0; | |
1071 | ||
1072 | msg.skb = skb; | |
1073 | msg.portid = NETLINK_CB(cb->skb).portid; | |
1074 | msg.seq = cb->nlh->nlmsg_seq; | |
1075 | ||
1076 | rtnl_lock(); | |
1077 | for (; media_info_array[i] != NULL; i++) { | |
f2f67390 ND |
1078 | err = __tipc_nl_add_media(&msg, media_info_array[i], |
1079 | NLM_F_MULTI); | |
46f15c67 RA |
1080 | if (err) |
1081 | break; | |
1082 | } | |
1083 | rtnl_unlock(); | |
1084 | ||
1085 | cb->args[0] = i; | |
1086 | return skb->len; | |
1087 | } | |
1088 | ||
1089 | int tipc_nl_media_get(struct sk_buff *skb, struct genl_info *info) | |
1090 | { | |
1091 | int err; | |
1092 | char *name; | |
1093 | struct tipc_nl_msg msg; | |
1094 | struct tipc_media *media; | |
1095 | struct sk_buff *rep; | |
1096 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
1097 | ||
1098 | if (!info->attrs[TIPC_NLA_MEDIA]) | |
1099 | return -EINVAL; | |
1100 | ||
1101 | err = nla_parse_nested(attrs, TIPC_NLA_MEDIA_MAX, | |
1102 | info->attrs[TIPC_NLA_MEDIA], | |
fe52145f | 1103 | tipc_nl_media_policy, info->extack); |
46f15c67 RA |
1104 | if (err) |
1105 | return err; | |
1106 | ||
1107 | if (!attrs[TIPC_NLA_MEDIA_NAME]) | |
1108 | return -EINVAL; | |
1109 | name = nla_data(attrs[TIPC_NLA_MEDIA_NAME]); | |
1110 | ||
1111 | rep = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); | |
1112 | if (!rep) | |
1113 | return -ENOMEM; | |
1114 | ||
1115 | msg.skb = rep; | |
1116 | msg.portid = info->snd_portid; | |
1117 | msg.seq = info->snd_seq; | |
1118 | ||
1119 | rtnl_lock(); | |
1120 | media = tipc_media_find(name); | |
1121 | if (!media) { | |
1122 | err = -EINVAL; | |
1123 | goto err_out; | |
1124 | } | |
1125 | ||
f2f67390 | 1126 | err = __tipc_nl_add_media(&msg, media, 0); |
46f15c67 RA |
1127 | if (err) |
1128 | goto err_out; | |
1129 | rtnl_unlock(); | |
1130 | ||
1131 | return genlmsg_reply(rep, info); | |
1132 | err_out: | |
1133 | rtnl_unlock(); | |
1134 | nlmsg_free(rep); | |
1135 | ||
1136 | return err; | |
1137 | } | |
1e55417d | 1138 | |
07ffb223 | 1139 | int __tipc_nl_media_set(struct sk_buff *skb, struct genl_info *info) |
1e55417d RA |
1140 | { |
1141 | int err; | |
1142 | char *name; | |
1143 | struct tipc_media *m; | |
1144 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
1145 | ||
1146 | if (!info->attrs[TIPC_NLA_MEDIA]) | |
1147 | return -EINVAL; | |
1148 | ||
1149 | err = nla_parse_nested(attrs, TIPC_NLA_MEDIA_MAX, | |
1150 | info->attrs[TIPC_NLA_MEDIA], | |
fe52145f | 1151 | tipc_nl_media_policy, info->extack); |
1e55417d RA |
1152 | |
1153 | if (!attrs[TIPC_NLA_MEDIA_NAME]) | |
1154 | return -EINVAL; | |
1155 | name = nla_data(attrs[TIPC_NLA_MEDIA_NAME]); | |
1156 | ||
1e55417d | 1157 | m = tipc_media_find(name); |
07ffb223 | 1158 | if (!m) |
1e55417d | 1159 | return -EINVAL; |
1e55417d RA |
1160 | |
1161 | if (attrs[TIPC_NLA_MEDIA_PROP]) { | |
1162 | struct nlattr *props[TIPC_NLA_PROP_MAX + 1]; | |
1163 | ||
1164 | err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_MEDIA_PROP], | |
1165 | props); | |
07ffb223 | 1166 | if (err) |
1e55417d | 1167 | return err; |
1e55417d RA |
1168 | |
1169 | if (props[TIPC_NLA_PROP_TOL]) | |
1170 | m->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]); | |
1171 | if (props[TIPC_NLA_PROP_PRIO]) | |
1172 | m->priority = nla_get_u32(props[TIPC_NLA_PROP_PRIO]); | |
1173 | if (props[TIPC_NLA_PROP_WIN]) | |
1174 | m->window = nla_get_u32(props[TIPC_NLA_PROP_WIN]); | |
1175 | } | |
1e55417d RA |
1176 | |
1177 | return 0; | |
1178 | } | |
07ffb223 YX |
1179 | |
1180 | int tipc_nl_media_set(struct sk_buff *skb, struct genl_info *info) | |
1181 | { | |
1182 | int err; | |
1183 | ||
1184 | rtnl_lock(); | |
1185 | err = __tipc_nl_media_set(skb, info); | |
1186 | rtnl_unlock(); | |
1187 | ||
1188 | return err; | |
1189 | } |