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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; | |
cb30a633 | 238 | int with_this_prio = 1; |
1a90632d JPM |
239 | struct tipc_bearer *b; |
240 | struct tipc_media *m; | |
4e801fa1 | 241 | struct sk_buff *skb; |
cb30a633 | 242 | int bearer_id = 0; |
b97bf3fd | 243 | int res = -EINVAL; |
cb30a633 | 244 | char *errstr = ""; |
b97bf3fd | 245 | |
f19765f4 | 246 | if (!bearer_name_validate(name, &b_names)) { |
cb30a633 JM |
247 | errstr = "illegal name"; |
248 | goto rejected; | |
a10bd924 | 249 | } |
cb30a633 | 250 | |
cb30a633 JM |
251 | if (prio > TIPC_MAX_LINK_PRI && prio != TIPC_MEDIA_LINK_PRI) { |
252 | errstr = "illegal priority"; | |
253 | goto rejected; | |
a10bd924 | 254 | } |
b97bf3fd | 255 | |
1a90632d JPM |
256 | m = tipc_media_find(b_names.media_name); |
257 | if (!m) { | |
cb30a633 JM |
258 | errstr = "media not registered"; |
259 | goto rejected; | |
b97bf3fd | 260 | } |
16cb4b33 | 261 | |
cb30a633 JM |
262 | if (prio == TIPC_MEDIA_LINK_PRI) |
263 | prio = m->priority; | |
b97bf3fd | 264 | |
cb30a633 JM |
265 | /* Check new bearer vs existing ones and find free bearer id if any */ |
266 | while (bearer_id < MAX_BEARERS) { | |
267 | b = rtnl_dereference(tn->bearer_list[bearer_id]); | |
268 | if (!b) | |
269 | break; | |
1a90632d | 270 | if (!strcmp(name, b->name)) { |
cb30a633 JM |
271 | errstr = "already enabled"; |
272 | goto rejected; | |
b97bf3fd | 273 | } |
cb30a633 JM |
274 | bearer_id++; |
275 | if (b->priority != prio) | |
276 | continue; | |
277 | if (++with_this_prio <= 2) | |
278 | continue; | |
279 | pr_warn("Bearer <%s>: already 2 bearers with priority %u\n", | |
280 | name, prio); | |
281 | if (prio == TIPC_MIN_LINK_PRI) { | |
282 | errstr = "cannot adjust to lower"; | |
283 | goto rejected; | |
b97bf3fd | 284 | } |
cb30a633 JM |
285 | pr_warn("Bearer <%s>: trying with adjusted priority\n", name); |
286 | prio--; | |
287 | bearer_id = 0; | |
288 | with_this_prio = 1; | |
b97bf3fd | 289 | } |
cb30a633 | 290 | |
b97bf3fd | 291 | if (bearer_id >= MAX_BEARERS) { |
cb30a633 JM |
292 | errstr = "max 3 bearers permitted"; |
293 | goto rejected; | |
b97bf3fd PL |
294 | } |
295 | ||
1a90632d JPM |
296 | b = kzalloc(sizeof(*b), GFP_ATOMIC); |
297 | if (!b) | |
7216cd94 YX |
298 | return -ENOMEM; |
299 | ||
1a90632d JPM |
300 | strcpy(b->name, name); |
301 | b->media = m; | |
302 | res = m->enable_media(net, b, attr); | |
b97bf3fd | 303 | if (res) { |
19142551 | 304 | kfree(b); |
cb30a633 JM |
305 | errstr = "failed to enable media"; |
306 | goto rejected; | |
b97bf3fd PL |
307 | } |
308 | ||
1a90632d JPM |
309 | b->identity = bearer_id; |
310 | b->tolerance = m->tolerance; | |
311 | b->window = m->window; | |
312 | b->domain = disc_domain; | |
313 | b->net_plane = bearer_id + 'A'; | |
cb30a633 | 314 | b->priority = prio; |
0d051bf9 | 315 | test_and_set_bit_lock(0, &b->up); |
3a777ff8 | 316 | |
4e801fa1 | 317 | res = tipc_disc_create(net, b, &b->bcast_addr, &skb); |
3a777ff8 | 318 | if (res) { |
1a90632d | 319 | bearer_disable(net, b); |
cb30a633 JM |
320 | kfree(b); |
321 | errstr = "failed to create discoverer"; | |
322 | goto rejected; | |
3a777ff8 | 323 | } |
3874ccbb | 324 | |
1a90632d | 325 | rcu_assign_pointer(tn->bearer_list[bearer_id], b); |
4e801fa1 JPM |
326 | if (skb) |
327 | tipc_bearer_xmit_skb(net, bearer_id, skb, &b->bcast_addr); | |
35c55c98 | 328 | |
19142551 TR |
329 | if (tipc_mon_create(net, bearer_id)) { |
330 | bearer_disable(net, b); | |
35c55c98 | 331 | return -ENOMEM; |
19142551 | 332 | } |
35c55c98 | 333 | |
20263641 JM |
334 | pr_info("Enabled bearer <%s>, priority %u\n", name, prio); |
335 | ||
cb30a633 JM |
336 | return res; |
337 | rejected: | |
20263641 | 338 | pr_warn("Enabling of bearer <%s> rejected, %s\n", name, errstr); |
b97bf3fd PL |
339 | return res; |
340 | } | |
341 | ||
342 | /** | |
512137ee | 343 | * tipc_reset_bearer - Reset all links established over this bearer |
b97bf3fd | 344 | */ |
1a90632d | 345 | static int tipc_reset_bearer(struct net *net, struct tipc_bearer *b) |
b97bf3fd | 346 | { |
1a90632d JPM |
347 | pr_info("Resetting bearer <%s>\n", b->name); |
348 | tipc_node_delete_links(net, b->identity); | |
349 | tipc_disc_reset(net, b); | |
0e35fd5e | 350 | return 0; |
b97bf3fd PL |
351 | } |
352 | ||
353 | /** | |
617d3c7a | 354 | * bearer_disable |
c4307285 | 355 | * |
7216cd94 | 356 | * Note: This routine assumes caller holds RTNL lock. |
b97bf3fd | 357 | */ |
1a90632d | 358 | static void bearer_disable(struct net *net, struct tipc_bearer *b) |
b97bf3fd | 359 | { |
5b7066c3 JPM |
360 | struct tipc_net *tn = tipc_net(net); |
361 | int bearer_id = b->identity; | |
3874ccbb | 362 | |
1a90632d | 363 | pr_info("Disabling bearer <%s>\n", b->name); |
0d051bf9 | 364 | clear_bit_unlock(0, &b->up); |
5b7066c3 | 365 | tipc_node_delete_links(net, bearer_id); |
0d051bf9 | 366 | b->media->disable_media(b); |
1a90632d | 367 | RCU_INIT_POINTER(b->media_ptr, NULL); |
b39e465e JM |
368 | if (b->disc) |
369 | tipc_disc_delete(b->disc); | |
5b7066c3 | 370 | RCU_INIT_POINTER(tn->bearer_list[bearer_id], NULL); |
1a90632d | 371 | kfree_rcu(b, rcu); |
35c55c98 | 372 | tipc_mon_delete(net, bearer_id); |
b97bf3fd PL |
373 | } |
374 | ||
d0f91938 EH |
375 | int tipc_enable_l2_media(struct net *net, struct tipc_bearer *b, |
376 | struct nlattr *attr[]) | |
e4d050cb | 377 | { |
52dfae5c JM |
378 | char *dev_name = strchr((const char *)b->name, ':') + 1; |
379 | int hwaddr_len = b->media->hwaddr_len; | |
380 | u8 node_id[NODE_ID_LEN] = {0,}; | |
e4d050cb | 381 | struct net_device *dev; |
e4d050cb YX |
382 | |
383 | /* Find device with specified name */ | |
52dfae5c | 384 | dev = dev_get_by_name(net, dev_name); |
e4d050cb YX |
385 | if (!dev) |
386 | return -ENODEV; | |
3de81b75 MK |
387 | if (tipc_mtu_bad(dev, 0)) { |
388 | dev_put(dev); | |
389 | return -EINVAL; | |
390 | } | |
e4d050cb | 391 | |
52dfae5c JM |
392 | /* Autoconfigure own node identity if needed */ |
393 | if (!tipc_own_id(net) && hwaddr_len <= NODE_ID_LEN) { | |
394 | memcpy(node_id, dev->dev_addr, hwaddr_len); | |
395 | tipc_net_init(net, node_id, 0); | |
396 | } | |
397 | if (!tipc_own_id(net)) { | |
63135ee0 | 398 | dev_put(dev); |
52dfae5c JM |
399 | pr_warn("Failed to obtain node identity\n"); |
400 | return -EINVAL; | |
401 | } | |
402 | ||
38504c28 | 403 | /* Associate TIPC bearer with L2 bearer */ |
2231c5af | 404 | rcu_assign_pointer(b->media_ptr, dev); |
d55c60eb PB |
405 | b->pt.dev = dev; |
406 | b->pt.type = htons(ETH_P_TIPC); | |
407 | b->pt.func = tipc_l2_rcv_msg; | |
408 | dev_add_pack(&b->pt); | |
38504c28 | 409 | memset(&b->bcast_addr, 0, sizeof(b->bcast_addr)); |
52dfae5c | 410 | memcpy(b->bcast_addr.value, dev->broadcast, hwaddr_len); |
e4d050cb | 411 | b->bcast_addr.media_id = b->media->type_id; |
9999974a | 412 | b->bcast_addr.broadcast = TIPC_BROADCAST_SUPPORT; |
e4d050cb | 413 | b->mtu = dev->mtu; |
38504c28 | 414 | b->media->raw2addr(b, &b->addr, (char *)dev->dev_addr); |
e4d050cb YX |
415 | rcu_assign_pointer(dev->tipc_ptr, b); |
416 | return 0; | |
417 | } | |
418 | ||
38504c28 | 419 | /* tipc_disable_l2_media - detach TIPC bearer from an L2 interface |
e4d050cb | 420 | * |
282b3a05 | 421 | * Mark L2 bearer as inactive so that incoming buffers are thrown away |
e4d050cb YX |
422 | */ |
423 | void tipc_disable_l2_media(struct tipc_bearer *b) | |
424 | { | |
2231c5af YX |
425 | struct net_device *dev; |
426 | ||
427 | dev = (struct net_device *)rtnl_dereference(b->media_ptr); | |
d55c60eb | 428 | dev_remove_pack(&b->pt); |
e4d050cb | 429 | RCU_INIT_POINTER(dev->tipc_ptr, NULL); |
f1c8d8cb | 430 | synchronize_net(); |
e4d050cb YX |
431 | dev_put(dev); |
432 | } | |
433 | ||
434 | /** | |
38504c28 | 435 | * tipc_l2_send_msg - send a TIPC packet out over an L2 interface |
5b7066c3 | 436 | * @skb: the packet to be sent |
1a90632d | 437 | * @b: the bearer through which the packet is to be sent |
e4d050cb YX |
438 | * @dest: peer destination address |
439 | */ | |
7214bcf8 | 440 | int tipc_l2_send_msg(struct net *net, struct sk_buff *skb, |
1da46568 | 441 | struct tipc_bearer *b, struct tipc_media_addr *dest) |
e4d050cb | 442 | { |
2231c5af | 443 | struct net_device *dev; |
e4d050cb | 444 | int delta; |
2231c5af YX |
445 | |
446 | dev = (struct net_device *)rcu_dereference_rtnl(b->media_ptr); | |
447 | if (!dev) | |
448 | return 0; | |
e4d050cb | 449 | |
0d051bf9 JPM |
450 | delta = SKB_DATA_ALIGN(dev->hard_header_len - skb_headroom(skb)); |
451 | if ((delta > 0) && pskb_expand_head(skb, delta, 0, GFP_ATOMIC)) { | |
452 | kfree_skb(skb); | |
453 | return 0; | |
454 | } | |
7214bcf8 JPM |
455 | skb_reset_network_header(skb); |
456 | skb->dev = dev; | |
457 | skb->protocol = htons(ETH_P_TIPC); | |
458 | dev_hard_header(skb, dev, ETH_P_TIPC, dest->value, | |
459 | dev->dev_addr, skb->len); | |
460 | dev_queue_xmit(skb); | |
e4d050cb YX |
461 | return 0; |
462 | } | |
463 | ||
9999974a JPM |
464 | bool tipc_bearer_bcast_support(struct net *net, u32 bearer_id) |
465 | { | |
466 | bool supp = false; | |
467 | struct tipc_bearer *b; | |
468 | ||
469 | rcu_read_lock(); | |
470 | b = bearer_get(net, bearer_id); | |
471 | if (b) | |
472 | supp = (b->bcast_addr.broadcast == TIPC_BROADCAST_SUPPORT); | |
473 | rcu_read_unlock(); | |
474 | return supp; | |
475 | } | |
476 | ||
959e1781 JPM |
477 | int tipc_bearer_mtu(struct net *net, u32 bearer_id) |
478 | { | |
479 | int mtu = 0; | |
480 | struct tipc_bearer *b; | |
481 | ||
482 | rcu_read_lock(); | |
483 | b = rcu_dereference_rtnl(tipc_net(net)->bearer_list[bearer_id]); | |
484 | if (b) | |
485 | mtu = b->mtu; | |
486 | rcu_read_unlock(); | |
487 | return mtu; | |
488 | } | |
489 | ||
60852d67 JPM |
490 | /* tipc_bearer_xmit_skb - sends buffer to destination over bearer |
491 | */ | |
492 | void tipc_bearer_xmit_skb(struct net *net, u32 bearer_id, | |
493 | struct sk_buff *skb, | |
494 | struct tipc_media_addr *dest) | |
495 | { | |
0d051bf9 | 496 | struct tipc_msg *hdr = buf_msg(skb); |
60852d67 JPM |
497 | struct tipc_bearer *b; |
498 | ||
499 | rcu_read_lock(); | |
0d051bf9 JPM |
500 | b = bearer_get(net, bearer_id); |
501 | if (likely(b && (test_bit(0, &b->up) || msg_is_reset(hdr)))) | |
60852d67 | 502 | b->media->send_msg(net, skb, b, dest); |
4e801fa1 JPM |
503 | else |
504 | kfree_skb(skb); | |
60852d67 | 505 | rcu_read_unlock(); |
60852d67 JPM |
506 | } |
507 | ||
af9b028e JPM |
508 | /* tipc_bearer_xmit() -send buffer to destination over bearer |
509 | */ | |
510 | void tipc_bearer_xmit(struct net *net, u32 bearer_id, | |
511 | struct sk_buff_head *xmitq, | |
512 | struct tipc_media_addr *dst) | |
513 | { | |
af9b028e JPM |
514 | struct tipc_bearer *b; |
515 | struct sk_buff *skb, *tmp; | |
516 | ||
517 | if (skb_queue_empty(xmitq)) | |
518 | return; | |
519 | ||
520 | rcu_read_lock(); | |
0d051bf9 | 521 | b = bearer_get(net, bearer_id); |
4e801fa1 JPM |
522 | if (unlikely(!b)) |
523 | __skb_queue_purge(xmitq); | |
524 | skb_queue_walk_safe(xmitq, skb, tmp) { | |
525 | __skb_dequeue(xmitq); | |
0d051bf9 JPM |
526 | if (likely(test_bit(0, &b->up) || msg_is_reset(buf_msg(skb)))) |
527 | b->media->send_msg(net, skb, b, dst); | |
528 | else | |
5128b185 | 529 | kfree_skb(skb); |
b06b281e JPM |
530 | } |
531 | rcu_read_unlock(); | |
532 | } | |
533 | ||
534 | /* tipc_bearer_bc_xmit() - broadcast buffers to all destinations | |
535 | */ | |
536 | void tipc_bearer_bc_xmit(struct net *net, u32 bearer_id, | |
537 | struct sk_buff_head *xmitq) | |
538 | { | |
539 | struct tipc_net *tn = tipc_net(net); | |
540 | int net_id = tn->net_id; | |
541 | struct tipc_bearer *b; | |
542 | struct sk_buff *skb, *tmp; | |
543 | struct tipc_msg *hdr; | |
544 | ||
545 | rcu_read_lock(); | |
0d051bf9 JPM |
546 | b = bearer_get(net, bearer_id); |
547 | if (unlikely(!b || !test_bit(0, &b->up))) | |
4e801fa1 JPM |
548 | __skb_queue_purge(xmitq); |
549 | skb_queue_walk_safe(xmitq, skb, tmp) { | |
550 | hdr = buf_msg(skb); | |
551 | msg_set_non_seq(hdr, 1); | |
552 | msg_set_mc_netid(hdr, net_id); | |
553 | __skb_dequeue(xmitq); | |
554 | b->media->send_msg(net, skb, b, &b->bcast_addr); | |
af9b028e JPM |
555 | } |
556 | rcu_read_unlock(); | |
557 | } | |
558 | ||
6e967adf YX |
559 | /** |
560 | * tipc_l2_rcv_msg - handle incoming TIPC message from an interface | |
561 | * @buf: the received packet | |
562 | * @dev: the net device that the packet was received on | |
563 | * @pt: the packet_type structure which was used to register this handler | |
564 | * @orig_dev: the original receive net device in case the device is a bond | |
565 | * | |
566 | * Accept only packets explicitly sent to this node, or broadcast packets; | |
567 | * ignores packets sent using interface multicast, and traffic sent to other | |
568 | * nodes (which can happen if interface is running in promiscuous mode). | |
569 | */ | |
4e801fa1 | 570 | static int tipc_l2_rcv_msg(struct sk_buff *skb, struct net_device *dev, |
6e967adf YX |
571 | struct packet_type *pt, struct net_device *orig_dev) |
572 | { | |
1a90632d | 573 | struct tipc_bearer *b; |
6e967adf | 574 | |
6e967adf | 575 | rcu_read_lock(); |
d55c60eb PB |
576 | b = rcu_dereference_rtnl(dev->tipc_ptr) ?: |
577 | rcu_dereference_rtnl(orig_dev->tipc_ptr); | |
0d051bf9 | 578 | if (likely(b && test_bit(0, &b->up) && |
fed5f571 | 579 | (skb->pkt_type <= PACKET_MULTICAST))) { |
a8305bff | 580 | skb_mark_not_on_list(skb); |
d55c60eb | 581 | tipc_rcv(dev_net(b->pt.dev), skb, b); |
4e801fa1 JPM |
582 | rcu_read_unlock(); |
583 | return NET_RX_SUCCESS; | |
6e967adf YX |
584 | } |
585 | rcu_read_unlock(); | |
4e801fa1 | 586 | kfree_skb(skb); |
6e967adf YX |
587 | return NET_RX_DROP; |
588 | } | |
589 | ||
590 | /** | |
591 | * tipc_l2_device_event - handle device events from network device | |
592 | * @nb: the context of the notification | |
593 | * @evt: the type of event | |
594 | * @ptr: the net device that the event was on | |
595 | * | |
596 | * This function is called by the Ethernet driver in case of link | |
597 | * change event. | |
598 | */ | |
599 | static int tipc_l2_device_event(struct notifier_block *nb, unsigned long evt, | |
600 | void *ptr) | |
601 | { | |
6e967adf | 602 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
c93d3baa | 603 | struct net *net = dev_net(dev); |
1a90632d | 604 | struct tipc_bearer *b; |
6e967adf | 605 | |
1a90632d JPM |
606 | b = rtnl_dereference(dev->tipc_ptr); |
607 | if (!b) | |
6e967adf | 608 | return NOTIFY_DONE; |
6e967adf | 609 | |
6e967adf YX |
610 | switch (evt) { |
611 | case NETDEV_CHANGE: | |
94b6ddce PB |
612 | if (netif_carrier_ok(dev) && netif_oper_up(dev)) { |
613 | test_and_set_bit_lock(0, &b->up); | |
6e967adf | 614 | break; |
94b6ddce PB |
615 | } |
616 | /* fall through */ | |
282b3a05 | 617 | case NETDEV_GOING_DOWN: |
0d051bf9 | 618 | clear_bit_unlock(0, &b->up); |
5b7066c3 JPM |
619 | tipc_reset_bearer(net, b); |
620 | break; | |
94b6ddce PB |
621 | case NETDEV_UP: |
622 | test_and_set_bit_lock(0, &b->up); | |
623 | break; | |
6e967adf | 624 | case NETDEV_CHANGEMTU: |
3de81b75 MK |
625 | if (tipc_mtu_bad(dev, 0)) { |
626 | bearer_disable(net, b); | |
627 | break; | |
628 | } | |
629 | b->mtu = dev->mtu; | |
1a90632d | 630 | tipc_reset_bearer(net, b); |
a21a584d | 631 | break; |
6e967adf | 632 | case NETDEV_CHANGEADDR: |
1a90632d | 633 | b->media->raw2addr(b, &b->addr, |
5b7066c3 | 634 | (char *)dev->dev_addr); |
1a90632d | 635 | tipc_reset_bearer(net, b); |
6e967adf YX |
636 | break; |
637 | case NETDEV_UNREGISTER: | |
638 | case NETDEV_CHANGENAME: | |
8e0deed9 | 639 | bearer_disable(net, b); |
6e967adf YX |
640 | break; |
641 | } | |
6e967adf YX |
642 | return NOTIFY_OK; |
643 | } | |
644 | ||
6e967adf YX |
645 | static struct notifier_block notifier = { |
646 | .notifier_call = tipc_l2_device_event, | |
647 | .priority = 0, | |
648 | }; | |
649 | ||
650 | int tipc_bearer_setup(void) | |
651 | { | |
d55c60eb | 652 | return register_netdevice_notifier(¬ifier); |
6e967adf YX |
653 | } |
654 | ||
655 | void tipc_bearer_cleanup(void) | |
656 | { | |
657 | unregister_netdevice_notifier(¬ifier); | |
6e967adf | 658 | } |
b97bf3fd | 659 | |
f2f9800d | 660 | void tipc_bearer_stop(struct net *net) |
b97bf3fd | 661 | { |
7f9f95d9 | 662 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
1a90632d | 663 | struct tipc_bearer *b; |
b97bf3fd PL |
664 | u32 i; |
665 | ||
b97bf3fd | 666 | for (i = 0; i < MAX_BEARERS; i++) { |
1a90632d JPM |
667 | b = rtnl_dereference(tn->bearer_list[i]); |
668 | if (b) { | |
669 | bearer_disable(net, b); | |
7f9f95d9 | 670 | tn->bearer_list[i] = NULL; |
3874ccbb | 671 | } |
b97bf3fd | 672 | } |
b97bf3fd | 673 | } |
0655f6a8 | 674 | |
35b9dd76 | 675 | /* Caller should hold rtnl_lock to protect the bearer */ |
d8182804 | 676 | static int __tipc_nl_add_bearer(struct tipc_nl_msg *msg, |
f2f67390 | 677 | struct tipc_bearer *bearer, int nlflags) |
35b9dd76 RA |
678 | { |
679 | void *hdr; | |
680 | struct nlattr *attrs; | |
681 | struct nlattr *prop; | |
682 | ||
bfb3e5dd | 683 | hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family, |
f2f67390 | 684 | nlflags, TIPC_NL_BEARER_GET); |
35b9dd76 RA |
685 | if (!hdr) |
686 | return -EMSGSIZE; | |
687 | ||
688 | attrs = nla_nest_start(msg->skb, TIPC_NLA_BEARER); | |
689 | if (!attrs) | |
690 | goto msg_full; | |
691 | ||
692 | if (nla_put_string(msg->skb, TIPC_NLA_BEARER_NAME, bearer->name)) | |
693 | goto attr_msg_full; | |
694 | ||
695 | prop = nla_nest_start(msg->skb, TIPC_NLA_BEARER_PROP); | |
696 | if (!prop) | |
697 | goto prop_msg_full; | |
698 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, bearer->priority)) | |
699 | goto prop_msg_full; | |
700 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, bearer->tolerance)) | |
701 | goto prop_msg_full; | |
702 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, bearer->window)) | |
703 | goto prop_msg_full; | |
682cd3cf GM |
704 | if (bearer->media->type_id == TIPC_MEDIA_TYPE_UDP) |
705 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_MTU, bearer->mtu)) | |
706 | goto prop_msg_full; | |
35b9dd76 RA |
707 | |
708 | nla_nest_end(msg->skb, prop); | |
fdb3accc RA |
709 | |
710 | #ifdef CONFIG_TIPC_MEDIA_UDP | |
711 | if (bearer->media->type_id == TIPC_MEDIA_TYPE_UDP) { | |
712 | if (tipc_udp_nl_add_bearer_data(msg, bearer)) | |
713 | goto attr_msg_full; | |
714 | } | |
715 | #endif | |
716 | ||
35b9dd76 RA |
717 | nla_nest_end(msg->skb, attrs); |
718 | genlmsg_end(msg->skb, hdr); | |
719 | ||
720 | return 0; | |
721 | ||
722 | prop_msg_full: | |
723 | nla_nest_cancel(msg->skb, prop); | |
724 | attr_msg_full: | |
725 | nla_nest_cancel(msg->skb, attrs); | |
726 | msg_full: | |
727 | genlmsg_cancel(msg->skb, hdr); | |
728 | ||
729 | return -EMSGSIZE; | |
730 | } | |
731 | ||
732 | int tipc_nl_bearer_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
733 | { | |
734 | int err; | |
735 | int i = cb->args[0]; | |
736 | struct tipc_bearer *bearer; | |
737 | struct tipc_nl_msg msg; | |
7f9f95d9 YX |
738 | struct net *net = sock_net(skb->sk); |
739 | struct tipc_net *tn = net_generic(net, tipc_net_id); | |
35b9dd76 RA |
740 | |
741 | if (i == MAX_BEARERS) | |
742 | return 0; | |
743 | ||
744 | msg.skb = skb; | |
745 | msg.portid = NETLINK_CB(cb->skb).portid; | |
746 | msg.seq = cb->nlh->nlmsg_seq; | |
747 | ||
748 | rtnl_lock(); | |
749 | for (i = 0; i < MAX_BEARERS; i++) { | |
7f9f95d9 | 750 | bearer = rtnl_dereference(tn->bearer_list[i]); |
35b9dd76 RA |
751 | if (!bearer) |
752 | continue; | |
753 | ||
f2f67390 | 754 | err = __tipc_nl_add_bearer(&msg, bearer, NLM_F_MULTI); |
35b9dd76 RA |
755 | if (err) |
756 | break; | |
757 | } | |
758 | rtnl_unlock(); | |
759 | ||
760 | cb->args[0] = i; | |
761 | return skb->len; | |
762 | } | |
763 | ||
764 | int tipc_nl_bearer_get(struct sk_buff *skb, struct genl_info *info) | |
765 | { | |
766 | int err; | |
767 | char *name; | |
768 | struct sk_buff *rep; | |
769 | struct tipc_bearer *bearer; | |
770 | struct tipc_nl_msg msg; | |
771 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
7f9f95d9 | 772 | struct net *net = genl_info_net(info); |
35b9dd76 RA |
773 | |
774 | if (!info->attrs[TIPC_NLA_BEARER]) | |
775 | return -EINVAL; | |
776 | ||
777 | err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX, | |
778 | info->attrs[TIPC_NLA_BEARER], | |
fe52145f | 779 | tipc_nl_bearer_policy, info->extack); |
35b9dd76 RA |
780 | if (err) |
781 | return err; | |
782 | ||
783 | if (!attrs[TIPC_NLA_BEARER_NAME]) | |
784 | return -EINVAL; | |
785 | name = nla_data(attrs[TIPC_NLA_BEARER_NAME]); | |
786 | ||
787 | rep = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); | |
788 | if (!rep) | |
789 | return -ENOMEM; | |
790 | ||
791 | msg.skb = rep; | |
792 | msg.portid = info->snd_portid; | |
793 | msg.seq = info->snd_seq; | |
794 | ||
795 | rtnl_lock(); | |
7f9f95d9 | 796 | bearer = tipc_bearer_find(net, name); |
35b9dd76 RA |
797 | if (!bearer) { |
798 | err = -EINVAL; | |
799 | goto err_out; | |
800 | } | |
801 | ||
f2f67390 | 802 | err = __tipc_nl_add_bearer(&msg, bearer, 0); |
35b9dd76 RA |
803 | if (err) |
804 | goto err_out; | |
805 | rtnl_unlock(); | |
806 | ||
807 | return genlmsg_reply(rep, info); | |
808 | err_out: | |
809 | rtnl_unlock(); | |
810 | nlmsg_free(rep); | |
811 | ||
812 | return err; | |
813 | } | |
814 | ||
d59d8b77 | 815 | int __tipc_nl_bearer_disable(struct sk_buff *skb, struct genl_info *info) |
0655f6a8 RA |
816 | { |
817 | int err; | |
818 | char *name; | |
819 | struct tipc_bearer *bearer; | |
820 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
9ab15465 | 821 | struct net *net = sock_net(skb->sk); |
0655f6a8 RA |
822 | |
823 | if (!info->attrs[TIPC_NLA_BEARER]) | |
824 | return -EINVAL; | |
825 | ||
826 | err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX, | |
827 | info->attrs[TIPC_NLA_BEARER], | |
fe52145f | 828 | tipc_nl_bearer_policy, info->extack); |
0655f6a8 RA |
829 | if (err) |
830 | return err; | |
831 | ||
832 | if (!attrs[TIPC_NLA_BEARER_NAME]) | |
833 | return -EINVAL; | |
834 | ||
835 | name = nla_data(attrs[TIPC_NLA_BEARER_NAME]); | |
836 | ||
7f9f95d9 | 837 | bearer = tipc_bearer_find(net, name); |
d59d8b77 | 838 | if (!bearer) |
0655f6a8 | 839 | return -EINVAL; |
0655f6a8 | 840 | |
b1c29f6b | 841 | bearer_disable(net, bearer); |
0655f6a8 RA |
842 | |
843 | return 0; | |
844 | } | |
845 | ||
d59d8b77 YX |
846 | int tipc_nl_bearer_disable(struct sk_buff *skb, struct genl_info *info) |
847 | { | |
848 | int err; | |
849 | ||
850 | rtnl_lock(); | |
851 | err = __tipc_nl_bearer_disable(skb, info); | |
852 | rtnl_unlock(); | |
853 | ||
854 | return err; | |
855 | } | |
856 | ||
45cf7edf | 857 | int __tipc_nl_bearer_enable(struct sk_buff *skb, struct genl_info *info) |
0655f6a8 RA |
858 | { |
859 | int err; | |
860 | char *bearer; | |
861 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
9ab15465 | 862 | struct net *net = sock_net(skb->sk); |
20263641 | 863 | u32 domain = 0; |
0655f6a8 RA |
864 | u32 prio; |
865 | ||
866 | prio = TIPC_MEDIA_LINK_PRI; | |
0655f6a8 RA |
867 | |
868 | if (!info->attrs[TIPC_NLA_BEARER]) | |
869 | return -EINVAL; | |
870 | ||
871 | err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX, | |
872 | info->attrs[TIPC_NLA_BEARER], | |
fe52145f | 873 | tipc_nl_bearer_policy, info->extack); |
0655f6a8 RA |
874 | if (err) |
875 | return err; | |
876 | ||
877 | if (!attrs[TIPC_NLA_BEARER_NAME]) | |
878 | return -EINVAL; | |
879 | ||
880 | bearer = nla_data(attrs[TIPC_NLA_BEARER_NAME]); | |
881 | ||
882 | if (attrs[TIPC_NLA_BEARER_DOMAIN]) | |
883 | domain = nla_get_u32(attrs[TIPC_NLA_BEARER_DOMAIN]); | |
884 | ||
885 | if (attrs[TIPC_NLA_BEARER_PROP]) { | |
886 | struct nlattr *props[TIPC_NLA_PROP_MAX + 1]; | |
887 | ||
888 | err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_BEARER_PROP], | |
889 | props); | |
890 | if (err) | |
891 | return err; | |
892 | ||
893 | if (props[TIPC_NLA_PROP_PRIO]) | |
894 | prio = nla_get_u32(props[TIPC_NLA_PROP_PRIO]); | |
895 | } | |
896 | ||
45cf7edf YX |
897 | return tipc_enable_bearer(net, bearer, domain, prio, attrs); |
898 | } | |
899 | ||
900 | int tipc_nl_bearer_enable(struct sk_buff *skb, struct genl_info *info) | |
901 | { | |
902 | int err; | |
903 | ||
0655f6a8 | 904 | rtnl_lock(); |
45cf7edf | 905 | err = __tipc_nl_bearer_enable(skb, info); |
0655f6a8 RA |
906 | rtnl_unlock(); |
907 | ||
45cf7edf | 908 | return err; |
0655f6a8 | 909 | } |
315c00bc | 910 | |
ef20cd4d RA |
911 | int tipc_nl_bearer_add(struct sk_buff *skb, struct genl_info *info) |
912 | { | |
913 | int err; | |
914 | char *name; | |
915 | struct tipc_bearer *b; | |
916 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
917 | struct net *net = sock_net(skb->sk); | |
918 | ||
919 | if (!info->attrs[TIPC_NLA_BEARER]) | |
920 | return -EINVAL; | |
921 | ||
922 | err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX, | |
923 | info->attrs[TIPC_NLA_BEARER], | |
fe52145f | 924 | tipc_nl_bearer_policy, info->extack); |
ef20cd4d RA |
925 | if (err) |
926 | return err; | |
927 | ||
928 | if (!attrs[TIPC_NLA_BEARER_NAME]) | |
929 | return -EINVAL; | |
930 | name = nla_data(attrs[TIPC_NLA_BEARER_NAME]); | |
931 | ||
932 | rtnl_lock(); | |
933 | b = tipc_bearer_find(net, name); | |
934 | if (!b) { | |
935 | rtnl_unlock(); | |
936 | return -EINVAL; | |
937 | } | |
938 | ||
939 | #ifdef CONFIG_TIPC_MEDIA_UDP | |
940 | if (attrs[TIPC_NLA_BEARER_UDP_OPTS]) { | |
941 | err = tipc_udp_nl_bearer_add(b, | |
942 | attrs[TIPC_NLA_BEARER_UDP_OPTS]); | |
943 | if (err) { | |
944 | rtnl_unlock(); | |
945 | return err; | |
946 | } | |
947 | } | |
948 | #endif | |
949 | rtnl_unlock(); | |
950 | ||
951 | return 0; | |
952 | } | |
953 | ||
93532bb1 | 954 | int __tipc_nl_bearer_set(struct sk_buff *skb, struct genl_info *info) |
315c00bc | 955 | { |
315c00bc RA |
956 | struct tipc_bearer *b; |
957 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
c3d6fb85 | 958 | struct net *net = sock_net(skb->sk); |
37c64cf6 JM |
959 | char *name; |
960 | int err; | |
315c00bc RA |
961 | |
962 | if (!info->attrs[TIPC_NLA_BEARER]) | |
963 | return -EINVAL; | |
964 | ||
965 | err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX, | |
966 | info->attrs[TIPC_NLA_BEARER], | |
fe52145f | 967 | tipc_nl_bearer_policy, info->extack); |
315c00bc RA |
968 | if (err) |
969 | return err; | |
970 | ||
971 | if (!attrs[TIPC_NLA_BEARER_NAME]) | |
972 | return -EINVAL; | |
973 | name = nla_data(attrs[TIPC_NLA_BEARER_NAME]); | |
974 | ||
7f9f95d9 | 975 | b = tipc_bearer_find(net, name); |
93532bb1 | 976 | if (!b) |
315c00bc | 977 | return -EINVAL; |
315c00bc RA |
978 | |
979 | if (attrs[TIPC_NLA_BEARER_PROP]) { | |
980 | struct nlattr *props[TIPC_NLA_PROP_MAX + 1]; | |
981 | ||
982 | err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_BEARER_PROP], | |
983 | props); | |
93532bb1 | 984 | if (err) |
315c00bc | 985 | return err; |
315c00bc | 986 | |
37c64cf6 | 987 | if (props[TIPC_NLA_PROP_TOL]) { |
315c00bc | 988 | b->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]); |
682cd3cf | 989 | tipc_node_apply_property(net, b, TIPC_NLA_PROP_TOL); |
37c64cf6 | 990 | } |
315c00bc RA |
991 | if (props[TIPC_NLA_PROP_PRIO]) |
992 | b->priority = nla_get_u32(props[TIPC_NLA_PROP_PRIO]); | |
993 | if (props[TIPC_NLA_PROP_WIN]) | |
994 | b->window = nla_get_u32(props[TIPC_NLA_PROP_WIN]); | |
682cd3cf GM |
995 | if (props[TIPC_NLA_PROP_MTU]) { |
996 | if (b->media->type_id != TIPC_MEDIA_TYPE_UDP) | |
997 | return -EINVAL; | |
998 | #ifdef CONFIG_TIPC_MEDIA_UDP | |
999 | if (tipc_udp_mtu_bad(nla_get_u32 | |
1000 | (props[TIPC_NLA_PROP_MTU]))) | |
1001 | return -EINVAL; | |
1002 | b->mtu = nla_get_u32(props[TIPC_NLA_PROP_MTU]); | |
1003 | tipc_node_apply_property(net, b, TIPC_NLA_PROP_MTU); | |
1004 | #endif | |
1005 | } | |
315c00bc | 1006 | } |
315c00bc RA |
1007 | |
1008 | return 0; | |
1009 | } | |
46f15c67 | 1010 | |
93532bb1 YX |
1011 | int tipc_nl_bearer_set(struct sk_buff *skb, struct genl_info *info) |
1012 | { | |
1013 | int err; | |
1014 | ||
1015 | rtnl_lock(); | |
1016 | err = __tipc_nl_bearer_set(skb, info); | |
1017 | rtnl_unlock(); | |
1018 | ||
1019 | return err; | |
1020 | } | |
1021 | ||
d8182804 | 1022 | static int __tipc_nl_add_media(struct tipc_nl_msg *msg, |
f2f67390 | 1023 | struct tipc_media *media, int nlflags) |
46f15c67 RA |
1024 | { |
1025 | void *hdr; | |
1026 | struct nlattr *attrs; | |
1027 | struct nlattr *prop; | |
1028 | ||
bfb3e5dd | 1029 | hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family, |
f2f67390 | 1030 | nlflags, TIPC_NL_MEDIA_GET); |
46f15c67 RA |
1031 | if (!hdr) |
1032 | return -EMSGSIZE; | |
1033 | ||
1034 | attrs = nla_nest_start(msg->skb, TIPC_NLA_MEDIA); | |
1035 | if (!attrs) | |
1036 | goto msg_full; | |
1037 | ||
1038 | if (nla_put_string(msg->skb, TIPC_NLA_MEDIA_NAME, media->name)) | |
1039 | goto attr_msg_full; | |
1040 | ||
1041 | prop = nla_nest_start(msg->skb, TIPC_NLA_MEDIA_PROP); | |
1042 | if (!prop) | |
1043 | goto prop_msg_full; | |
1044 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, media->priority)) | |
1045 | goto prop_msg_full; | |
1046 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, media->tolerance)) | |
1047 | goto prop_msg_full; | |
1048 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, media->window)) | |
1049 | goto prop_msg_full; | |
901271e0 GM |
1050 | if (media->type_id == TIPC_MEDIA_TYPE_UDP) |
1051 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_MTU, media->mtu)) | |
1052 | goto prop_msg_full; | |
46f15c67 RA |
1053 | |
1054 | nla_nest_end(msg->skb, prop); | |
1055 | nla_nest_end(msg->skb, attrs); | |
1056 | genlmsg_end(msg->skb, hdr); | |
1057 | ||
1058 | return 0; | |
1059 | ||
1060 | prop_msg_full: | |
1061 | nla_nest_cancel(msg->skb, prop); | |
1062 | attr_msg_full: | |
1063 | nla_nest_cancel(msg->skb, attrs); | |
1064 | msg_full: | |
1065 | genlmsg_cancel(msg->skb, hdr); | |
1066 | ||
1067 | return -EMSGSIZE; | |
1068 | } | |
1069 | ||
1070 | int tipc_nl_media_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
1071 | { | |
1072 | int err; | |
1073 | int i = cb->args[0]; | |
1074 | struct tipc_nl_msg msg; | |
1075 | ||
1076 | if (i == MAX_MEDIA) | |
1077 | return 0; | |
1078 | ||
1079 | msg.skb = skb; | |
1080 | msg.portid = NETLINK_CB(cb->skb).portid; | |
1081 | msg.seq = cb->nlh->nlmsg_seq; | |
1082 | ||
1083 | rtnl_lock(); | |
1084 | for (; media_info_array[i] != NULL; i++) { | |
f2f67390 ND |
1085 | err = __tipc_nl_add_media(&msg, media_info_array[i], |
1086 | NLM_F_MULTI); | |
46f15c67 RA |
1087 | if (err) |
1088 | break; | |
1089 | } | |
1090 | rtnl_unlock(); | |
1091 | ||
1092 | cb->args[0] = i; | |
1093 | return skb->len; | |
1094 | } | |
1095 | ||
1096 | int tipc_nl_media_get(struct sk_buff *skb, struct genl_info *info) | |
1097 | { | |
1098 | int err; | |
1099 | char *name; | |
1100 | struct tipc_nl_msg msg; | |
1101 | struct tipc_media *media; | |
1102 | struct sk_buff *rep; | |
1103 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
1104 | ||
1105 | if (!info->attrs[TIPC_NLA_MEDIA]) | |
1106 | return -EINVAL; | |
1107 | ||
1108 | err = nla_parse_nested(attrs, TIPC_NLA_MEDIA_MAX, | |
1109 | info->attrs[TIPC_NLA_MEDIA], | |
fe52145f | 1110 | tipc_nl_media_policy, info->extack); |
46f15c67 RA |
1111 | if (err) |
1112 | return err; | |
1113 | ||
1114 | if (!attrs[TIPC_NLA_MEDIA_NAME]) | |
1115 | return -EINVAL; | |
1116 | name = nla_data(attrs[TIPC_NLA_MEDIA_NAME]); | |
1117 | ||
1118 | rep = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); | |
1119 | if (!rep) | |
1120 | return -ENOMEM; | |
1121 | ||
1122 | msg.skb = rep; | |
1123 | msg.portid = info->snd_portid; | |
1124 | msg.seq = info->snd_seq; | |
1125 | ||
1126 | rtnl_lock(); | |
1127 | media = tipc_media_find(name); | |
1128 | if (!media) { | |
1129 | err = -EINVAL; | |
1130 | goto err_out; | |
1131 | } | |
1132 | ||
f2f67390 | 1133 | err = __tipc_nl_add_media(&msg, media, 0); |
46f15c67 RA |
1134 | if (err) |
1135 | goto err_out; | |
1136 | rtnl_unlock(); | |
1137 | ||
1138 | return genlmsg_reply(rep, info); | |
1139 | err_out: | |
1140 | rtnl_unlock(); | |
1141 | nlmsg_free(rep); | |
1142 | ||
1143 | return err; | |
1144 | } | |
1e55417d | 1145 | |
07ffb223 | 1146 | int __tipc_nl_media_set(struct sk_buff *skb, struct genl_info *info) |
1e55417d RA |
1147 | { |
1148 | int err; | |
1149 | char *name; | |
1150 | struct tipc_media *m; | |
1151 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
1152 | ||
1153 | if (!info->attrs[TIPC_NLA_MEDIA]) | |
1154 | return -EINVAL; | |
1155 | ||
1156 | err = nla_parse_nested(attrs, TIPC_NLA_MEDIA_MAX, | |
1157 | info->attrs[TIPC_NLA_MEDIA], | |
fe52145f | 1158 | tipc_nl_media_policy, info->extack); |
1e55417d RA |
1159 | |
1160 | if (!attrs[TIPC_NLA_MEDIA_NAME]) | |
1161 | return -EINVAL; | |
1162 | name = nla_data(attrs[TIPC_NLA_MEDIA_NAME]); | |
1163 | ||
1e55417d | 1164 | m = tipc_media_find(name); |
07ffb223 | 1165 | if (!m) |
1e55417d | 1166 | return -EINVAL; |
1e55417d RA |
1167 | |
1168 | if (attrs[TIPC_NLA_MEDIA_PROP]) { | |
1169 | struct nlattr *props[TIPC_NLA_PROP_MAX + 1]; | |
1170 | ||
1171 | err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_MEDIA_PROP], | |
1172 | props); | |
07ffb223 | 1173 | if (err) |
1e55417d | 1174 | return err; |
1e55417d RA |
1175 | |
1176 | if (props[TIPC_NLA_PROP_TOL]) | |
1177 | m->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]); | |
1178 | if (props[TIPC_NLA_PROP_PRIO]) | |
1179 | m->priority = nla_get_u32(props[TIPC_NLA_PROP_PRIO]); | |
1180 | if (props[TIPC_NLA_PROP_WIN]) | |
1181 | m->window = nla_get_u32(props[TIPC_NLA_PROP_WIN]); | |
901271e0 GM |
1182 | if (props[TIPC_NLA_PROP_MTU]) { |
1183 | if (m->type_id != TIPC_MEDIA_TYPE_UDP) | |
1184 | return -EINVAL; | |
1185 | #ifdef CONFIG_TIPC_MEDIA_UDP | |
1186 | if (tipc_udp_mtu_bad(nla_get_u32 | |
1187 | (props[TIPC_NLA_PROP_MTU]))) | |
1188 | return -EINVAL; | |
1189 | m->mtu = nla_get_u32(props[TIPC_NLA_PROP_MTU]); | |
1190 | #endif | |
1191 | } | |
1e55417d | 1192 | } |
1e55417d RA |
1193 | |
1194 | return 0; | |
1195 | } | |
07ffb223 YX |
1196 | |
1197 | int tipc_nl_media_set(struct sk_buff *skb, struct genl_info *info) | |
1198 | { | |
1199 | int err; | |
1200 | ||
1201 | rtnl_lock(); | |
1202 | err = __tipc_nl_media_set(skb, info); | |
1203 | rtnl_unlock(); | |
1204 | ||
1205 | return err; | |
1206 | } |