Commit | Line | Data |
---|---|---|
b97bf3fd PL |
1 | /* |
2 | * net/tipc/bearer.c: TIPC bearer code | |
c4307285 | 3 | * |
35c55c98 | 4 | * Copyright (c) 1996-2006, 2013-2016, Ericsson AB |
e4d050cb | 5 | * Copyright (c) 2004-2006, 2010-2013, Wind River Systems |
b97bf3fd PL |
6 | * All rights reserved. |
7 | * | |
9ea1fd3c | 8 | * Redistribution and use in source and binary forms, with or without |
b97bf3fd PL |
9 | * modification, are permitted provided that the following conditions are met: |
10 | * | |
9ea1fd3c PL |
11 | * 1. Redistributions of source code must retain the above copyright |
12 | * notice, this list of conditions and the following disclaimer. | |
13 | * 2. Redistributions in binary form must reproduce the above copyright | |
14 | * notice, this list of conditions and the following disclaimer in the | |
15 | * documentation and/or other materials provided with the distribution. | |
16 | * 3. Neither the names of the copyright holders nor the names of its | |
17 | * contributors may be used to endorse or promote products derived from | |
18 | * this software without specific prior written permission. | |
b97bf3fd | 19 | * |
9ea1fd3c PL |
20 | * Alternatively, this software may be distributed under the terms of the |
21 | * GNU General Public License ("GPL") version 2 as published by the Free | |
22 | * Software Foundation. | |
23 | * | |
24 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" | |
25 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
26 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
27 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE | |
28 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
29 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
30 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | |
31 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | |
32 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
33 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
b97bf3fd PL |
34 | * POSSIBILITY OF SUCH DAMAGE. |
35 | */ | |
36 | ||
7f9f95d9 | 37 | #include <net/sock.h> |
b97bf3fd | 38 | #include "core.h" |
b97bf3fd | 39 | #include "bearer.h" |
0655f6a8 | 40 | #include "link.h" |
b97bf3fd | 41 | #include "discover.h" |
35c55c98 | 42 | #include "monitor.h" |
1da46568 | 43 | #include "bcast.h" |
49cc66ea | 44 | #include "netlink.h" |
ef20cd4d | 45 | #include "udp_media.h" |
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 | */ |
b4b9771b | 102 | int 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++) |
b4b9771b TL |
117 | ret += scnprintf(buf + ret, len - ret, |
118 | "-%x", a->value[i]); | |
b97bf3fd | 119 | } |
b4b9771b | 120 | return ret; |
b97bf3fd PL |
121 | } |
122 | ||
b97bf3fd PL |
123 | /** |
124 | * bearer_name_validate - validate & (optionally) deconstruct bearer name | |
2c53040f BH |
125 | * @name: ptr to bearer name string |
126 | * @name_parts: ptr to area for bearer name components (or NULL if not needed) | |
c4307285 | 127 | * |
b97bf3fd PL |
128 | * Returns 1 if bearer name is valid, otherwise 0. |
129 | */ | |
c4307285 | 130 | static int bearer_name_validate(const char *name, |
f19765f4 | 131 | struct tipc_bearer_names *name_parts) |
b97bf3fd PL |
132 | { |
133 | char name_copy[TIPC_MAX_BEARER_NAME]; | |
134 | char *media_name; | |
135 | char *if_name; | |
136 | u32 media_len; | |
137 | u32 if_len; | |
138 | ||
139 | /* copy bearer name & ensure length is OK */ | |
b97bf3fd PL |
140 | name_copy[TIPC_MAX_BEARER_NAME - 1] = 0; |
141 | /* need above in case non-Posix strncpy() doesn't pad with nulls */ | |
142 | strncpy(name_copy, name, TIPC_MAX_BEARER_NAME); | |
143 | if (name_copy[TIPC_MAX_BEARER_NAME - 1] != 0) | |
144 | return 0; | |
145 | ||
146 | /* ensure all component parts of bearer name are present */ | |
b97bf3fd | 147 | media_name = name_copy; |
2db9983a AS |
148 | if_name = strchr(media_name, ':'); |
149 | if (if_name == NULL) | |
b97bf3fd PL |
150 | return 0; |
151 | *(if_name++) = 0; | |
152 | media_len = if_name - media_name; | |
153 | if_len = strlen(if_name) + 1; | |
154 | ||
155 | /* validate component parts of bearer name */ | |
c4307285 | 156 | if ((media_len <= 1) || (media_len > TIPC_MAX_MEDIA_NAME) || |
fc073938 | 157 | (if_len <= 1) || (if_len > TIPC_MAX_IF_NAME)) |
b97bf3fd PL |
158 | return 0; |
159 | ||
160 | /* return bearer name components, if necessary */ | |
b97bf3fd PL |
161 | if (name_parts) { |
162 | strcpy(name_parts->media_name, media_name); | |
163 | strcpy(name_parts->if_name, if_name); | |
164 | } | |
165 | return 1; | |
166 | } | |
167 | ||
168 | /** | |
5c216e1d | 169 | * tipc_bearer_find - locates bearer object with matching bearer name |
b97bf3fd | 170 | */ |
7f9f95d9 | 171 | struct tipc_bearer *tipc_bearer_find(struct net *net, const char *name) |
b97bf3fd | 172 | { |
7f9f95d9 | 173 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
1a90632d | 174 | struct tipc_bearer *b; |
b97bf3fd PL |
175 | u32 i; |
176 | ||
3874ccbb | 177 | for (i = 0; i < MAX_BEARERS; i++) { |
1a90632d JPM |
178 | b = rtnl_dereference(tn->bearer_list[i]); |
179 | if (b && (!strcmp(b->name, name))) | |
180 | return b; | |
b97bf3fd | 181 | } |
1fc54d8f | 182 | return NULL; |
b97bf3fd PL |
183 | } |
184 | ||
ff0d3e78 PB |
185 | /* tipc_bearer_get_name - get the bearer name from its id. |
186 | * @net: network namespace | |
187 | * @name: a pointer to the buffer where the name will be stored. | |
188 | * @bearer_id: the id to get the name from. | |
189 | */ | |
190 | int tipc_bearer_get_name(struct net *net, char *name, u32 bearer_id) | |
191 | { | |
192 | struct tipc_net *tn = tipc_net(net); | |
193 | struct tipc_bearer *b; | |
194 | ||
195 | if (bearer_id >= MAX_BEARERS) | |
196 | return -EINVAL; | |
197 | ||
198 | b = rtnl_dereference(tn->bearer_list[bearer_id]); | |
199 | if (!b) | |
200 | return -EINVAL; | |
201 | ||
202 | strcpy(name, b->name); | |
203 | return 0; | |
204 | } | |
205 | ||
7f9f95d9 | 206 | void tipc_bearer_add_dest(struct net *net, u32 bearer_id, u32 dest) |
b97bf3fd | 207 | { |
7f9f95d9 | 208 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
1a90632d | 209 | struct tipc_bearer *b; |
7a2f7d18 YX |
210 | |
211 | rcu_read_lock(); | |
1a90632d JPM |
212 | b = rcu_dereference_rtnl(tn->bearer_list[bearer_id]); |
213 | if (b) | |
b39e465e | 214 | tipc_disc_add_dest(b->disc); |
7a2f7d18 | 215 | rcu_read_unlock(); |
b97bf3fd PL |
216 | } |
217 | ||
7f9f95d9 | 218 | void tipc_bearer_remove_dest(struct net *net, u32 bearer_id, u32 dest) |
b97bf3fd | 219 | { |
7f9f95d9 | 220 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
1a90632d | 221 | struct tipc_bearer *b; |
7a2f7d18 YX |
222 | |
223 | rcu_read_lock(); | |
1a90632d JPM |
224 | b = rcu_dereference_rtnl(tn->bearer_list[bearer_id]); |
225 | if (b) | |
b39e465e | 226 | tipc_disc_remove_dest(b->disc); |
7a2f7d18 | 227 | rcu_read_unlock(); |
b97bf3fd PL |
228 | } |
229 | ||
b97bf3fd PL |
230 | /** |
231 | * tipc_enable_bearer - enable bearer with the given name | |
c4307285 | 232 | */ |
9ab15465 | 233 | static int tipc_enable_bearer(struct net *net, const char *name, |
cb30a633 | 234 | u32 disc_domain, u32 prio, |
d0f91938 | 235 | struct nlattr *attr[]) |
b97bf3fd | 236 | { |
cb30a633 JM |
237 | struct tipc_net *tn = tipc_net(net); |
238 | struct tipc_bearer_names b_names; | |
cb30a633 | 239 | int with_this_prio = 1; |
1a90632d JPM |
240 | struct tipc_bearer *b; |
241 | struct tipc_media *m; | |
4e801fa1 | 242 | struct sk_buff *skb; |
cb30a633 | 243 | int bearer_id = 0; |
b97bf3fd | 244 | int res = -EINVAL; |
cb30a633 | 245 | char *errstr = ""; |
b97bf3fd | 246 | |
f19765f4 | 247 | if (!bearer_name_validate(name, &b_names)) { |
cb30a633 JM |
248 | errstr = "illegal name"; |
249 | goto rejected; | |
a10bd924 | 250 | } |
cb30a633 | 251 | |
cb30a633 JM |
252 | if (prio > TIPC_MAX_LINK_PRI && prio != TIPC_MEDIA_LINK_PRI) { |
253 | errstr = "illegal priority"; | |
254 | goto rejected; | |
a10bd924 | 255 | } |
b97bf3fd | 256 | |
1a90632d JPM |
257 | m = tipc_media_find(b_names.media_name); |
258 | if (!m) { | |
cb30a633 JM |
259 | errstr = "media not registered"; |
260 | goto rejected; | |
b97bf3fd | 261 | } |
16cb4b33 | 262 | |
cb30a633 JM |
263 | if (prio == TIPC_MEDIA_LINK_PRI) |
264 | prio = m->priority; | |
b97bf3fd | 265 | |
cb30a633 JM |
266 | /* Check new bearer vs existing ones and find free bearer id if any */ |
267 | while (bearer_id < MAX_BEARERS) { | |
268 | b = rtnl_dereference(tn->bearer_list[bearer_id]); | |
269 | if (!b) | |
270 | break; | |
1a90632d | 271 | if (!strcmp(name, b->name)) { |
cb30a633 JM |
272 | errstr = "already enabled"; |
273 | goto rejected; | |
b97bf3fd | 274 | } |
cb30a633 JM |
275 | bearer_id++; |
276 | if (b->priority != prio) | |
277 | continue; | |
278 | if (++with_this_prio <= 2) | |
279 | continue; | |
280 | pr_warn("Bearer <%s>: already 2 bearers with priority %u\n", | |
281 | name, prio); | |
282 | if (prio == TIPC_MIN_LINK_PRI) { | |
283 | errstr = "cannot adjust to lower"; | |
284 | goto rejected; | |
b97bf3fd | 285 | } |
cb30a633 JM |
286 | pr_warn("Bearer <%s>: trying with adjusted priority\n", name); |
287 | prio--; | |
288 | bearer_id = 0; | |
289 | with_this_prio = 1; | |
b97bf3fd | 290 | } |
cb30a633 | 291 | |
b97bf3fd | 292 | if (bearer_id >= MAX_BEARERS) { |
cb30a633 JM |
293 | errstr = "max 3 bearers permitted"; |
294 | goto rejected; | |
b97bf3fd PL |
295 | } |
296 | ||
1a90632d JPM |
297 | b = kzalloc(sizeof(*b), GFP_ATOMIC); |
298 | if (!b) | |
7216cd94 YX |
299 | return -ENOMEM; |
300 | ||
1a90632d JPM |
301 | strcpy(b->name, name); |
302 | b->media = m; | |
303 | res = m->enable_media(net, b, attr); | |
b97bf3fd | 304 | if (res) { |
19142551 | 305 | kfree(b); |
cb30a633 JM |
306 | errstr = "failed to enable media"; |
307 | goto rejected; | |
b97bf3fd PL |
308 | } |
309 | ||
1a90632d JPM |
310 | b->identity = bearer_id; |
311 | b->tolerance = m->tolerance; | |
312 | b->window = m->window; | |
313 | b->domain = disc_domain; | |
314 | b->net_plane = bearer_id + 'A'; | |
cb30a633 | 315 | b->priority = prio; |
0d051bf9 | 316 | test_and_set_bit_lock(0, &b->up); |
3a777ff8 | 317 | |
4e801fa1 | 318 | res = tipc_disc_create(net, b, &b->bcast_addr, &skb); |
3a777ff8 | 319 | if (res) { |
1a90632d | 320 | bearer_disable(net, b); |
cb30a633 JM |
321 | kfree(b); |
322 | errstr = "failed to create discoverer"; | |
323 | goto rejected; | |
3a777ff8 | 324 | } |
3874ccbb | 325 | |
1a90632d | 326 | rcu_assign_pointer(tn->bearer_list[bearer_id], b); |
4e801fa1 JPM |
327 | if (skb) |
328 | tipc_bearer_xmit_skb(net, bearer_id, skb, &b->bcast_addr); | |
35c55c98 | 329 | |
19142551 TR |
330 | if (tipc_mon_create(net, bearer_id)) { |
331 | bearer_disable(net, b); | |
35c55c98 | 332 | return -ENOMEM; |
19142551 | 333 | } |
35c55c98 | 334 | |
20263641 JM |
335 | pr_info("Enabled bearer <%s>, priority %u\n", name, prio); |
336 | ||
cb30a633 JM |
337 | return res; |
338 | rejected: | |
20263641 | 339 | pr_warn("Enabling of bearer <%s> rejected, %s\n", name, errstr); |
b97bf3fd PL |
340 | return res; |
341 | } | |
342 | ||
343 | /** | |
512137ee | 344 | * tipc_reset_bearer - Reset all links established over this bearer |
b97bf3fd | 345 | */ |
1a90632d | 346 | static int tipc_reset_bearer(struct net *net, struct tipc_bearer *b) |
b97bf3fd | 347 | { |
1a90632d JPM |
348 | pr_info("Resetting bearer <%s>\n", b->name); |
349 | tipc_node_delete_links(net, b->identity); | |
350 | tipc_disc_reset(net, b); | |
0e35fd5e | 351 | return 0; |
b97bf3fd PL |
352 | } |
353 | ||
354 | /** | |
617d3c7a | 355 | * bearer_disable |
c4307285 | 356 | * |
7216cd94 | 357 | * Note: This routine assumes caller holds RTNL lock. |
b97bf3fd | 358 | */ |
1a90632d | 359 | static void bearer_disable(struct net *net, struct tipc_bearer *b) |
b97bf3fd | 360 | { |
5b7066c3 JPM |
361 | struct tipc_net *tn = tipc_net(net); |
362 | int bearer_id = b->identity; | |
3874ccbb | 363 | |
1a90632d | 364 | pr_info("Disabling bearer <%s>\n", b->name); |
0d051bf9 | 365 | clear_bit_unlock(0, &b->up); |
5b7066c3 | 366 | tipc_node_delete_links(net, bearer_id); |
0d051bf9 | 367 | b->media->disable_media(b); |
1a90632d | 368 | RCU_INIT_POINTER(b->media_ptr, NULL); |
b39e465e JM |
369 | if (b->disc) |
370 | tipc_disc_delete(b->disc); | |
5b7066c3 | 371 | RCU_INIT_POINTER(tn->bearer_list[bearer_id], NULL); |
1a90632d | 372 | kfree_rcu(b, rcu); |
35c55c98 | 373 | tipc_mon_delete(net, bearer_id); |
b97bf3fd PL |
374 | } |
375 | ||
d0f91938 EH |
376 | int tipc_enable_l2_media(struct net *net, struct tipc_bearer *b, |
377 | struct nlattr *attr[]) | |
e4d050cb | 378 | { |
52dfae5c JM |
379 | char *dev_name = strchr((const char *)b->name, ':') + 1; |
380 | int hwaddr_len = b->media->hwaddr_len; | |
381 | u8 node_id[NODE_ID_LEN] = {0,}; | |
e4d050cb | 382 | struct net_device *dev; |
e4d050cb YX |
383 | |
384 | /* Find device with specified name */ | |
52dfae5c | 385 | dev = dev_get_by_name(net, dev_name); |
e4d050cb YX |
386 | if (!dev) |
387 | return -ENODEV; | |
3de81b75 MK |
388 | if (tipc_mtu_bad(dev, 0)) { |
389 | dev_put(dev); | |
390 | return -EINVAL; | |
391 | } | |
e4d050cb | 392 | |
52dfae5c JM |
393 | /* Autoconfigure own node identity if needed */ |
394 | if (!tipc_own_id(net) && hwaddr_len <= NODE_ID_LEN) { | |
395 | memcpy(node_id, dev->dev_addr, hwaddr_len); | |
396 | tipc_net_init(net, node_id, 0); | |
397 | } | |
398 | if (!tipc_own_id(net)) { | |
63135ee0 | 399 | dev_put(dev); |
52dfae5c JM |
400 | pr_warn("Failed to obtain node identity\n"); |
401 | return -EINVAL; | |
402 | } | |
403 | ||
38504c28 | 404 | /* Associate TIPC bearer with L2 bearer */ |
2231c5af | 405 | rcu_assign_pointer(b->media_ptr, dev); |
d55c60eb PB |
406 | b->pt.dev = dev; |
407 | b->pt.type = htons(ETH_P_TIPC); | |
408 | b->pt.func = tipc_l2_rcv_msg; | |
409 | dev_add_pack(&b->pt); | |
38504c28 | 410 | memset(&b->bcast_addr, 0, sizeof(b->bcast_addr)); |
52dfae5c | 411 | memcpy(b->bcast_addr.value, dev->broadcast, hwaddr_len); |
e4d050cb | 412 | b->bcast_addr.media_id = b->media->type_id; |
9999974a | 413 | b->bcast_addr.broadcast = TIPC_BROADCAST_SUPPORT; |
e4d050cb | 414 | b->mtu = dev->mtu; |
38504c28 | 415 | b->media->raw2addr(b, &b->addr, (char *)dev->dev_addr); |
e4d050cb YX |
416 | rcu_assign_pointer(dev->tipc_ptr, b); |
417 | return 0; | |
418 | } | |
419 | ||
38504c28 | 420 | /* tipc_disable_l2_media - detach TIPC bearer from an L2 interface |
e4d050cb | 421 | * |
282b3a05 | 422 | * Mark L2 bearer as inactive so that incoming buffers are thrown away |
e4d050cb YX |
423 | */ |
424 | void tipc_disable_l2_media(struct tipc_bearer *b) | |
425 | { | |
2231c5af YX |
426 | struct net_device *dev; |
427 | ||
428 | dev = (struct net_device *)rtnl_dereference(b->media_ptr); | |
d55c60eb | 429 | dev_remove_pack(&b->pt); |
e4d050cb | 430 | RCU_INIT_POINTER(dev->tipc_ptr, NULL); |
f1c8d8cb | 431 | synchronize_net(); |
e4d050cb YX |
432 | dev_put(dev); |
433 | } | |
434 | ||
435 | /** | |
38504c28 | 436 | * tipc_l2_send_msg - send a TIPC packet out over an L2 interface |
5b7066c3 | 437 | * @skb: the packet to be sent |
1a90632d | 438 | * @b: the bearer through which the packet is to be sent |
e4d050cb YX |
439 | * @dest: peer destination address |
440 | */ | |
7214bcf8 | 441 | int tipc_l2_send_msg(struct net *net, struct sk_buff *skb, |
1da46568 | 442 | struct tipc_bearer *b, struct tipc_media_addr *dest) |
e4d050cb | 443 | { |
2231c5af | 444 | struct net_device *dev; |
e4d050cb | 445 | int delta; |
2231c5af YX |
446 | |
447 | dev = (struct net_device *)rcu_dereference_rtnl(b->media_ptr); | |
448 | if (!dev) | |
449 | return 0; | |
e4d050cb | 450 | |
0d051bf9 JPM |
451 | delta = SKB_DATA_ALIGN(dev->hard_header_len - skb_headroom(skb)); |
452 | if ((delta > 0) && pskb_expand_head(skb, delta, 0, GFP_ATOMIC)) { | |
453 | kfree_skb(skb); | |
454 | return 0; | |
455 | } | |
7214bcf8 JPM |
456 | skb_reset_network_header(skb); |
457 | skb->dev = dev; | |
458 | skb->protocol = htons(ETH_P_TIPC); | |
459 | dev_hard_header(skb, dev, ETH_P_TIPC, dest->value, | |
460 | dev->dev_addr, skb->len); | |
461 | dev_queue_xmit(skb); | |
e4d050cb YX |
462 | return 0; |
463 | } | |
464 | ||
9999974a JPM |
465 | bool tipc_bearer_bcast_support(struct net *net, u32 bearer_id) |
466 | { | |
467 | bool supp = false; | |
468 | struct tipc_bearer *b; | |
469 | ||
470 | rcu_read_lock(); | |
471 | b = bearer_get(net, bearer_id); | |
472 | if (b) | |
473 | supp = (b->bcast_addr.broadcast == TIPC_BROADCAST_SUPPORT); | |
474 | rcu_read_unlock(); | |
475 | return supp; | |
476 | } | |
477 | ||
959e1781 JPM |
478 | int tipc_bearer_mtu(struct net *net, u32 bearer_id) |
479 | { | |
480 | int mtu = 0; | |
481 | struct tipc_bearer *b; | |
482 | ||
483 | rcu_read_lock(); | |
484 | b = rcu_dereference_rtnl(tipc_net(net)->bearer_list[bearer_id]); | |
485 | if (b) | |
486 | mtu = b->mtu; | |
487 | rcu_read_unlock(); | |
488 | return mtu; | |
489 | } | |
490 | ||
60852d67 JPM |
491 | /* tipc_bearer_xmit_skb - sends buffer to destination over bearer |
492 | */ | |
493 | void tipc_bearer_xmit_skb(struct net *net, u32 bearer_id, | |
494 | struct sk_buff *skb, | |
495 | struct tipc_media_addr *dest) | |
496 | { | |
0d051bf9 | 497 | struct tipc_msg *hdr = buf_msg(skb); |
60852d67 JPM |
498 | struct tipc_bearer *b; |
499 | ||
500 | rcu_read_lock(); | |
0d051bf9 JPM |
501 | b = bearer_get(net, bearer_id); |
502 | if (likely(b && (test_bit(0, &b->up) || msg_is_reset(hdr)))) | |
60852d67 | 503 | b->media->send_msg(net, skb, b, dest); |
4e801fa1 JPM |
504 | else |
505 | kfree_skb(skb); | |
60852d67 | 506 | rcu_read_unlock(); |
60852d67 JPM |
507 | } |
508 | ||
af9b028e JPM |
509 | /* tipc_bearer_xmit() -send buffer to destination over bearer |
510 | */ | |
511 | void tipc_bearer_xmit(struct net *net, u32 bearer_id, | |
512 | struct sk_buff_head *xmitq, | |
513 | struct tipc_media_addr *dst) | |
514 | { | |
af9b028e JPM |
515 | struct tipc_bearer *b; |
516 | struct sk_buff *skb, *tmp; | |
517 | ||
518 | if (skb_queue_empty(xmitq)) | |
519 | return; | |
520 | ||
521 | rcu_read_lock(); | |
0d051bf9 | 522 | b = bearer_get(net, bearer_id); |
4e801fa1 JPM |
523 | if (unlikely(!b)) |
524 | __skb_queue_purge(xmitq); | |
525 | skb_queue_walk_safe(xmitq, skb, tmp) { | |
526 | __skb_dequeue(xmitq); | |
0d051bf9 JPM |
527 | if (likely(test_bit(0, &b->up) || msg_is_reset(buf_msg(skb)))) |
528 | b->media->send_msg(net, skb, b, dst); | |
529 | else | |
5128b185 | 530 | kfree_skb(skb); |
b06b281e JPM |
531 | } |
532 | rcu_read_unlock(); | |
533 | } | |
534 | ||
535 | /* tipc_bearer_bc_xmit() - broadcast buffers to all destinations | |
536 | */ | |
537 | void tipc_bearer_bc_xmit(struct net *net, u32 bearer_id, | |
538 | struct sk_buff_head *xmitq) | |
539 | { | |
540 | struct tipc_net *tn = tipc_net(net); | |
541 | int net_id = tn->net_id; | |
542 | struct tipc_bearer *b; | |
543 | struct sk_buff *skb, *tmp; | |
544 | struct tipc_msg *hdr; | |
545 | ||
546 | rcu_read_lock(); | |
0d051bf9 JPM |
547 | b = bearer_get(net, bearer_id); |
548 | if (unlikely(!b || !test_bit(0, &b->up))) | |
4e801fa1 JPM |
549 | __skb_queue_purge(xmitq); |
550 | skb_queue_walk_safe(xmitq, skb, tmp) { | |
551 | hdr = buf_msg(skb); | |
552 | msg_set_non_seq(hdr, 1); | |
553 | msg_set_mc_netid(hdr, net_id); | |
554 | __skb_dequeue(xmitq); | |
555 | b->media->send_msg(net, skb, b, &b->bcast_addr); | |
af9b028e JPM |
556 | } |
557 | rcu_read_unlock(); | |
558 | } | |
559 | ||
6e967adf YX |
560 | /** |
561 | * tipc_l2_rcv_msg - handle incoming TIPC message from an interface | |
562 | * @buf: the received packet | |
563 | * @dev: the net device that the packet was received on | |
564 | * @pt: the packet_type structure which was used to register this handler | |
565 | * @orig_dev: the original receive net device in case the device is a bond | |
566 | * | |
567 | * Accept only packets explicitly sent to this node, or broadcast packets; | |
568 | * ignores packets sent using interface multicast, and traffic sent to other | |
569 | * nodes (which can happen if interface is running in promiscuous mode). | |
570 | */ | |
4e801fa1 | 571 | static int tipc_l2_rcv_msg(struct sk_buff *skb, struct net_device *dev, |
6e967adf YX |
572 | struct packet_type *pt, struct net_device *orig_dev) |
573 | { | |
1a90632d | 574 | struct tipc_bearer *b; |
6e967adf | 575 | |
6e967adf | 576 | rcu_read_lock(); |
d55c60eb PB |
577 | b = rcu_dereference_rtnl(dev->tipc_ptr) ?: |
578 | rcu_dereference_rtnl(orig_dev->tipc_ptr); | |
0d051bf9 | 579 | if (likely(b && test_bit(0, &b->up) && |
fed5f571 | 580 | (skb->pkt_type <= PACKET_MULTICAST))) { |
a8305bff | 581 | skb_mark_not_on_list(skb); |
d55c60eb | 582 | tipc_rcv(dev_net(b->pt.dev), skb, b); |
4e801fa1 JPM |
583 | rcu_read_unlock(); |
584 | return NET_RX_SUCCESS; | |
6e967adf YX |
585 | } |
586 | rcu_read_unlock(); | |
4e801fa1 | 587 | kfree_skb(skb); |
6e967adf YX |
588 | return NET_RX_DROP; |
589 | } | |
590 | ||
591 | /** | |
592 | * tipc_l2_device_event - handle device events from network device | |
593 | * @nb: the context of the notification | |
594 | * @evt: the type of event | |
595 | * @ptr: the net device that the event was on | |
596 | * | |
597 | * This function is called by the Ethernet driver in case of link | |
598 | * change event. | |
599 | */ | |
600 | static int tipc_l2_device_event(struct notifier_block *nb, unsigned long evt, | |
601 | void *ptr) | |
602 | { | |
6e967adf | 603 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
c93d3baa | 604 | struct net *net = dev_net(dev); |
1a90632d | 605 | struct tipc_bearer *b; |
6e967adf | 606 | |
1a90632d JPM |
607 | b = rtnl_dereference(dev->tipc_ptr); |
608 | if (!b) | |
6e967adf | 609 | return NOTIFY_DONE; |
6e967adf | 610 | |
6e967adf YX |
611 | switch (evt) { |
612 | case NETDEV_CHANGE: | |
94b6ddce PB |
613 | if (netif_carrier_ok(dev) && netif_oper_up(dev)) { |
614 | test_and_set_bit_lock(0, &b->up); | |
6e967adf | 615 | break; |
94b6ddce PB |
616 | } |
617 | /* fall through */ | |
282b3a05 | 618 | case NETDEV_GOING_DOWN: |
0d051bf9 | 619 | clear_bit_unlock(0, &b->up); |
5b7066c3 JPM |
620 | tipc_reset_bearer(net, b); |
621 | break; | |
94b6ddce PB |
622 | case NETDEV_UP: |
623 | test_and_set_bit_lock(0, &b->up); | |
624 | break; | |
6e967adf | 625 | case NETDEV_CHANGEMTU: |
3de81b75 MK |
626 | if (tipc_mtu_bad(dev, 0)) { |
627 | bearer_disable(net, b); | |
628 | break; | |
629 | } | |
630 | b->mtu = dev->mtu; | |
1a90632d | 631 | tipc_reset_bearer(net, b); |
a21a584d | 632 | break; |
6e967adf | 633 | case NETDEV_CHANGEADDR: |
1a90632d | 634 | b->media->raw2addr(b, &b->addr, |
5b7066c3 | 635 | (char *)dev->dev_addr); |
1a90632d | 636 | tipc_reset_bearer(net, b); |
6e967adf YX |
637 | break; |
638 | case NETDEV_UNREGISTER: | |
639 | case NETDEV_CHANGENAME: | |
8e0deed9 | 640 | bearer_disable(net, b); |
6e967adf YX |
641 | break; |
642 | } | |
6e967adf YX |
643 | return NOTIFY_OK; |
644 | } | |
645 | ||
6e967adf YX |
646 | static struct notifier_block notifier = { |
647 | .notifier_call = tipc_l2_device_event, | |
648 | .priority = 0, | |
649 | }; | |
650 | ||
651 | int tipc_bearer_setup(void) | |
652 | { | |
d55c60eb | 653 | return register_netdevice_notifier(¬ifier); |
6e967adf YX |
654 | } |
655 | ||
656 | void tipc_bearer_cleanup(void) | |
657 | { | |
658 | unregister_netdevice_notifier(¬ifier); | |
6e967adf | 659 | } |
b97bf3fd | 660 | |
f2f9800d | 661 | void tipc_bearer_stop(struct net *net) |
b97bf3fd | 662 | { |
7f9f95d9 | 663 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
1a90632d | 664 | struct tipc_bearer *b; |
b97bf3fd PL |
665 | u32 i; |
666 | ||
b97bf3fd | 667 | for (i = 0; i < MAX_BEARERS; i++) { |
1a90632d JPM |
668 | b = rtnl_dereference(tn->bearer_list[i]); |
669 | if (b) { | |
670 | bearer_disable(net, b); | |
7f9f95d9 | 671 | tn->bearer_list[i] = NULL; |
3874ccbb | 672 | } |
b97bf3fd | 673 | } |
b97bf3fd | 674 | } |
0655f6a8 | 675 | |
35b9dd76 | 676 | /* Caller should hold rtnl_lock to protect the bearer */ |
d8182804 | 677 | static int __tipc_nl_add_bearer(struct tipc_nl_msg *msg, |
f2f67390 | 678 | struct tipc_bearer *bearer, int nlflags) |
35b9dd76 RA |
679 | { |
680 | void *hdr; | |
681 | struct nlattr *attrs; | |
682 | struct nlattr *prop; | |
683 | ||
bfb3e5dd | 684 | hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family, |
f2f67390 | 685 | nlflags, TIPC_NL_BEARER_GET); |
35b9dd76 RA |
686 | if (!hdr) |
687 | return -EMSGSIZE; | |
688 | ||
689 | attrs = nla_nest_start(msg->skb, TIPC_NLA_BEARER); | |
690 | if (!attrs) | |
691 | goto msg_full; | |
692 | ||
693 | if (nla_put_string(msg->skb, TIPC_NLA_BEARER_NAME, bearer->name)) | |
694 | goto attr_msg_full; | |
695 | ||
696 | prop = nla_nest_start(msg->skb, TIPC_NLA_BEARER_PROP); | |
697 | if (!prop) | |
698 | goto prop_msg_full; | |
699 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, bearer->priority)) | |
700 | goto prop_msg_full; | |
701 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, bearer->tolerance)) | |
702 | goto prop_msg_full; | |
703 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, bearer->window)) | |
704 | goto prop_msg_full; | |
682cd3cf GM |
705 | if (bearer->media->type_id == TIPC_MEDIA_TYPE_UDP) |
706 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_MTU, bearer->mtu)) | |
707 | goto prop_msg_full; | |
35b9dd76 RA |
708 | |
709 | nla_nest_end(msg->skb, prop); | |
fdb3accc RA |
710 | |
711 | #ifdef CONFIG_TIPC_MEDIA_UDP | |
712 | if (bearer->media->type_id == TIPC_MEDIA_TYPE_UDP) { | |
713 | if (tipc_udp_nl_add_bearer_data(msg, bearer)) | |
714 | goto attr_msg_full; | |
715 | } | |
716 | #endif | |
717 | ||
35b9dd76 RA |
718 | nla_nest_end(msg->skb, attrs); |
719 | genlmsg_end(msg->skb, hdr); | |
720 | ||
721 | return 0; | |
722 | ||
723 | prop_msg_full: | |
724 | nla_nest_cancel(msg->skb, prop); | |
725 | attr_msg_full: | |
726 | nla_nest_cancel(msg->skb, attrs); | |
727 | msg_full: | |
728 | genlmsg_cancel(msg->skb, hdr); | |
729 | ||
730 | return -EMSGSIZE; | |
731 | } | |
732 | ||
733 | int tipc_nl_bearer_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
734 | { | |
735 | int err; | |
736 | int i = cb->args[0]; | |
737 | struct tipc_bearer *bearer; | |
738 | struct tipc_nl_msg msg; | |
7f9f95d9 YX |
739 | struct net *net = sock_net(skb->sk); |
740 | struct tipc_net *tn = net_generic(net, tipc_net_id); | |
35b9dd76 RA |
741 | |
742 | if (i == MAX_BEARERS) | |
743 | return 0; | |
744 | ||
745 | msg.skb = skb; | |
746 | msg.portid = NETLINK_CB(cb->skb).portid; | |
747 | msg.seq = cb->nlh->nlmsg_seq; | |
748 | ||
749 | rtnl_lock(); | |
750 | for (i = 0; i < MAX_BEARERS; i++) { | |
7f9f95d9 | 751 | bearer = rtnl_dereference(tn->bearer_list[i]); |
35b9dd76 RA |
752 | if (!bearer) |
753 | continue; | |
754 | ||
f2f67390 | 755 | err = __tipc_nl_add_bearer(&msg, bearer, NLM_F_MULTI); |
35b9dd76 RA |
756 | if (err) |
757 | break; | |
758 | } | |
759 | rtnl_unlock(); | |
760 | ||
761 | cb->args[0] = i; | |
762 | return skb->len; | |
763 | } | |
764 | ||
765 | int tipc_nl_bearer_get(struct sk_buff *skb, struct genl_info *info) | |
766 | { | |
767 | int err; | |
768 | char *name; | |
769 | struct sk_buff *rep; | |
770 | struct tipc_bearer *bearer; | |
771 | struct tipc_nl_msg msg; | |
772 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
7f9f95d9 | 773 | struct net *net = genl_info_net(info); |
35b9dd76 RA |
774 | |
775 | if (!info->attrs[TIPC_NLA_BEARER]) | |
776 | return -EINVAL; | |
777 | ||
778 | err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX, | |
779 | info->attrs[TIPC_NLA_BEARER], | |
fe52145f | 780 | tipc_nl_bearer_policy, info->extack); |
35b9dd76 RA |
781 | if (err) |
782 | return err; | |
783 | ||
784 | if (!attrs[TIPC_NLA_BEARER_NAME]) | |
785 | return -EINVAL; | |
786 | name = nla_data(attrs[TIPC_NLA_BEARER_NAME]); | |
787 | ||
788 | rep = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); | |
789 | if (!rep) | |
790 | return -ENOMEM; | |
791 | ||
792 | msg.skb = rep; | |
793 | msg.portid = info->snd_portid; | |
794 | msg.seq = info->snd_seq; | |
795 | ||
796 | rtnl_lock(); | |
7f9f95d9 | 797 | bearer = tipc_bearer_find(net, name); |
35b9dd76 RA |
798 | if (!bearer) { |
799 | err = -EINVAL; | |
800 | goto err_out; | |
801 | } | |
802 | ||
f2f67390 | 803 | err = __tipc_nl_add_bearer(&msg, bearer, 0); |
35b9dd76 RA |
804 | if (err) |
805 | goto err_out; | |
806 | rtnl_unlock(); | |
807 | ||
808 | return genlmsg_reply(rep, info); | |
809 | err_out: | |
810 | rtnl_unlock(); | |
811 | nlmsg_free(rep); | |
812 | ||
813 | return err; | |
814 | } | |
815 | ||
d59d8b77 | 816 | int __tipc_nl_bearer_disable(struct sk_buff *skb, struct genl_info *info) |
0655f6a8 RA |
817 | { |
818 | int err; | |
819 | char *name; | |
820 | struct tipc_bearer *bearer; | |
821 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
9ab15465 | 822 | struct net *net = sock_net(skb->sk); |
0655f6a8 RA |
823 | |
824 | if (!info->attrs[TIPC_NLA_BEARER]) | |
825 | return -EINVAL; | |
826 | ||
827 | err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX, | |
828 | info->attrs[TIPC_NLA_BEARER], | |
fe52145f | 829 | tipc_nl_bearer_policy, info->extack); |
0655f6a8 RA |
830 | if (err) |
831 | return err; | |
832 | ||
833 | if (!attrs[TIPC_NLA_BEARER_NAME]) | |
834 | return -EINVAL; | |
835 | ||
836 | name = nla_data(attrs[TIPC_NLA_BEARER_NAME]); | |
837 | ||
7f9f95d9 | 838 | bearer = tipc_bearer_find(net, name); |
d59d8b77 | 839 | if (!bearer) |
0655f6a8 | 840 | return -EINVAL; |
0655f6a8 | 841 | |
b1c29f6b | 842 | bearer_disable(net, bearer); |
0655f6a8 RA |
843 | |
844 | return 0; | |
845 | } | |
846 | ||
d59d8b77 YX |
847 | int tipc_nl_bearer_disable(struct sk_buff *skb, struct genl_info *info) |
848 | { | |
849 | int err; | |
850 | ||
851 | rtnl_lock(); | |
852 | err = __tipc_nl_bearer_disable(skb, info); | |
853 | rtnl_unlock(); | |
854 | ||
855 | return err; | |
856 | } | |
857 | ||
45cf7edf | 858 | int __tipc_nl_bearer_enable(struct sk_buff *skb, struct genl_info *info) |
0655f6a8 RA |
859 | { |
860 | int err; | |
861 | char *bearer; | |
862 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
9ab15465 | 863 | struct net *net = sock_net(skb->sk); |
20263641 | 864 | u32 domain = 0; |
0655f6a8 RA |
865 | u32 prio; |
866 | ||
867 | prio = TIPC_MEDIA_LINK_PRI; | |
0655f6a8 RA |
868 | |
869 | if (!info->attrs[TIPC_NLA_BEARER]) | |
870 | return -EINVAL; | |
871 | ||
872 | err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX, | |
873 | info->attrs[TIPC_NLA_BEARER], | |
fe52145f | 874 | tipc_nl_bearer_policy, info->extack); |
0655f6a8 RA |
875 | if (err) |
876 | return err; | |
877 | ||
878 | if (!attrs[TIPC_NLA_BEARER_NAME]) | |
879 | return -EINVAL; | |
880 | ||
881 | bearer = nla_data(attrs[TIPC_NLA_BEARER_NAME]); | |
882 | ||
883 | if (attrs[TIPC_NLA_BEARER_DOMAIN]) | |
884 | domain = nla_get_u32(attrs[TIPC_NLA_BEARER_DOMAIN]); | |
885 | ||
886 | if (attrs[TIPC_NLA_BEARER_PROP]) { | |
887 | struct nlattr *props[TIPC_NLA_PROP_MAX + 1]; | |
888 | ||
889 | err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_BEARER_PROP], | |
890 | props); | |
891 | if (err) | |
892 | return err; | |
893 | ||
894 | if (props[TIPC_NLA_PROP_PRIO]) | |
895 | prio = nla_get_u32(props[TIPC_NLA_PROP_PRIO]); | |
896 | } | |
897 | ||
45cf7edf YX |
898 | return tipc_enable_bearer(net, bearer, domain, prio, attrs); |
899 | } | |
900 | ||
901 | int tipc_nl_bearer_enable(struct sk_buff *skb, struct genl_info *info) | |
902 | { | |
903 | int err; | |
904 | ||
0655f6a8 | 905 | rtnl_lock(); |
45cf7edf | 906 | err = __tipc_nl_bearer_enable(skb, info); |
0655f6a8 RA |
907 | rtnl_unlock(); |
908 | ||
45cf7edf | 909 | return err; |
0655f6a8 | 910 | } |
315c00bc | 911 | |
ef20cd4d RA |
912 | int tipc_nl_bearer_add(struct sk_buff *skb, struct genl_info *info) |
913 | { | |
914 | int err; | |
915 | char *name; | |
916 | struct tipc_bearer *b; | |
917 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
918 | struct net *net = sock_net(skb->sk); | |
919 | ||
920 | if (!info->attrs[TIPC_NLA_BEARER]) | |
921 | return -EINVAL; | |
922 | ||
923 | err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX, | |
924 | info->attrs[TIPC_NLA_BEARER], | |
fe52145f | 925 | tipc_nl_bearer_policy, info->extack); |
ef20cd4d RA |
926 | if (err) |
927 | return err; | |
928 | ||
929 | if (!attrs[TIPC_NLA_BEARER_NAME]) | |
930 | return -EINVAL; | |
931 | name = nla_data(attrs[TIPC_NLA_BEARER_NAME]); | |
932 | ||
933 | rtnl_lock(); | |
934 | b = tipc_bearer_find(net, name); | |
935 | if (!b) { | |
936 | rtnl_unlock(); | |
937 | return -EINVAL; | |
938 | } | |
939 | ||
940 | #ifdef CONFIG_TIPC_MEDIA_UDP | |
941 | if (attrs[TIPC_NLA_BEARER_UDP_OPTS]) { | |
942 | err = tipc_udp_nl_bearer_add(b, | |
943 | attrs[TIPC_NLA_BEARER_UDP_OPTS]); | |
944 | if (err) { | |
945 | rtnl_unlock(); | |
946 | return err; | |
947 | } | |
948 | } | |
949 | #endif | |
950 | rtnl_unlock(); | |
951 | ||
952 | return 0; | |
953 | } | |
954 | ||
93532bb1 | 955 | int __tipc_nl_bearer_set(struct sk_buff *skb, struct genl_info *info) |
315c00bc | 956 | { |
315c00bc RA |
957 | struct tipc_bearer *b; |
958 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
c3d6fb85 | 959 | struct net *net = sock_net(skb->sk); |
37c64cf6 JM |
960 | char *name; |
961 | int err; | |
315c00bc RA |
962 | |
963 | if (!info->attrs[TIPC_NLA_BEARER]) | |
964 | return -EINVAL; | |
965 | ||
966 | err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX, | |
967 | info->attrs[TIPC_NLA_BEARER], | |
fe52145f | 968 | tipc_nl_bearer_policy, info->extack); |
315c00bc RA |
969 | if (err) |
970 | return err; | |
971 | ||
972 | if (!attrs[TIPC_NLA_BEARER_NAME]) | |
973 | return -EINVAL; | |
974 | name = nla_data(attrs[TIPC_NLA_BEARER_NAME]); | |
975 | ||
7f9f95d9 | 976 | b = tipc_bearer_find(net, name); |
93532bb1 | 977 | if (!b) |
315c00bc | 978 | return -EINVAL; |
315c00bc RA |
979 | |
980 | if (attrs[TIPC_NLA_BEARER_PROP]) { | |
981 | struct nlattr *props[TIPC_NLA_PROP_MAX + 1]; | |
982 | ||
983 | err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_BEARER_PROP], | |
984 | props); | |
93532bb1 | 985 | if (err) |
315c00bc | 986 | return err; |
315c00bc | 987 | |
37c64cf6 | 988 | if (props[TIPC_NLA_PROP_TOL]) { |
315c00bc | 989 | b->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]); |
682cd3cf | 990 | tipc_node_apply_property(net, b, TIPC_NLA_PROP_TOL); |
37c64cf6 | 991 | } |
315c00bc RA |
992 | if (props[TIPC_NLA_PROP_PRIO]) |
993 | b->priority = nla_get_u32(props[TIPC_NLA_PROP_PRIO]); | |
994 | if (props[TIPC_NLA_PROP_WIN]) | |
995 | b->window = nla_get_u32(props[TIPC_NLA_PROP_WIN]); | |
682cd3cf GM |
996 | if (props[TIPC_NLA_PROP_MTU]) { |
997 | if (b->media->type_id != TIPC_MEDIA_TYPE_UDP) | |
998 | return -EINVAL; | |
999 | #ifdef CONFIG_TIPC_MEDIA_UDP | |
1000 | if (tipc_udp_mtu_bad(nla_get_u32 | |
1001 | (props[TIPC_NLA_PROP_MTU]))) | |
1002 | return -EINVAL; | |
1003 | b->mtu = nla_get_u32(props[TIPC_NLA_PROP_MTU]); | |
1004 | tipc_node_apply_property(net, b, TIPC_NLA_PROP_MTU); | |
1005 | #endif | |
1006 | } | |
315c00bc | 1007 | } |
315c00bc RA |
1008 | |
1009 | return 0; | |
1010 | } | |
46f15c67 | 1011 | |
93532bb1 YX |
1012 | int tipc_nl_bearer_set(struct sk_buff *skb, struct genl_info *info) |
1013 | { | |
1014 | int err; | |
1015 | ||
1016 | rtnl_lock(); | |
1017 | err = __tipc_nl_bearer_set(skb, info); | |
1018 | rtnl_unlock(); | |
1019 | ||
1020 | return err; | |
1021 | } | |
1022 | ||
d8182804 | 1023 | static int __tipc_nl_add_media(struct tipc_nl_msg *msg, |
f2f67390 | 1024 | struct tipc_media *media, int nlflags) |
46f15c67 RA |
1025 | { |
1026 | void *hdr; | |
1027 | struct nlattr *attrs; | |
1028 | struct nlattr *prop; | |
1029 | ||
bfb3e5dd | 1030 | hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family, |
f2f67390 | 1031 | nlflags, TIPC_NL_MEDIA_GET); |
46f15c67 RA |
1032 | if (!hdr) |
1033 | return -EMSGSIZE; | |
1034 | ||
1035 | attrs = nla_nest_start(msg->skb, TIPC_NLA_MEDIA); | |
1036 | if (!attrs) | |
1037 | goto msg_full; | |
1038 | ||
1039 | if (nla_put_string(msg->skb, TIPC_NLA_MEDIA_NAME, media->name)) | |
1040 | goto attr_msg_full; | |
1041 | ||
1042 | prop = nla_nest_start(msg->skb, TIPC_NLA_MEDIA_PROP); | |
1043 | if (!prop) | |
1044 | goto prop_msg_full; | |
1045 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, media->priority)) | |
1046 | goto prop_msg_full; | |
1047 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, media->tolerance)) | |
1048 | goto prop_msg_full; | |
1049 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, media->window)) | |
1050 | goto prop_msg_full; | |
901271e0 GM |
1051 | if (media->type_id == TIPC_MEDIA_TYPE_UDP) |
1052 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_MTU, media->mtu)) | |
1053 | goto prop_msg_full; | |
46f15c67 RA |
1054 | |
1055 | nla_nest_end(msg->skb, prop); | |
1056 | nla_nest_end(msg->skb, attrs); | |
1057 | genlmsg_end(msg->skb, hdr); | |
1058 | ||
1059 | return 0; | |
1060 | ||
1061 | prop_msg_full: | |
1062 | nla_nest_cancel(msg->skb, prop); | |
1063 | attr_msg_full: | |
1064 | nla_nest_cancel(msg->skb, attrs); | |
1065 | msg_full: | |
1066 | genlmsg_cancel(msg->skb, hdr); | |
1067 | ||
1068 | return -EMSGSIZE; | |
1069 | } | |
1070 | ||
1071 | int tipc_nl_media_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
1072 | { | |
1073 | int err; | |
1074 | int i = cb->args[0]; | |
1075 | struct tipc_nl_msg msg; | |
1076 | ||
1077 | if (i == MAX_MEDIA) | |
1078 | return 0; | |
1079 | ||
1080 | msg.skb = skb; | |
1081 | msg.portid = NETLINK_CB(cb->skb).portid; | |
1082 | msg.seq = cb->nlh->nlmsg_seq; | |
1083 | ||
1084 | rtnl_lock(); | |
1085 | for (; media_info_array[i] != NULL; i++) { | |
f2f67390 ND |
1086 | err = __tipc_nl_add_media(&msg, media_info_array[i], |
1087 | NLM_F_MULTI); | |
46f15c67 RA |
1088 | if (err) |
1089 | break; | |
1090 | } | |
1091 | rtnl_unlock(); | |
1092 | ||
1093 | cb->args[0] = i; | |
1094 | return skb->len; | |
1095 | } | |
1096 | ||
1097 | int tipc_nl_media_get(struct sk_buff *skb, struct genl_info *info) | |
1098 | { | |
1099 | int err; | |
1100 | char *name; | |
1101 | struct tipc_nl_msg msg; | |
1102 | struct tipc_media *media; | |
1103 | struct sk_buff *rep; | |
1104 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
1105 | ||
1106 | if (!info->attrs[TIPC_NLA_MEDIA]) | |
1107 | return -EINVAL; | |
1108 | ||
1109 | err = nla_parse_nested(attrs, TIPC_NLA_MEDIA_MAX, | |
1110 | info->attrs[TIPC_NLA_MEDIA], | |
fe52145f | 1111 | tipc_nl_media_policy, info->extack); |
46f15c67 RA |
1112 | if (err) |
1113 | return err; | |
1114 | ||
1115 | if (!attrs[TIPC_NLA_MEDIA_NAME]) | |
1116 | return -EINVAL; | |
1117 | name = nla_data(attrs[TIPC_NLA_MEDIA_NAME]); | |
1118 | ||
1119 | rep = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); | |
1120 | if (!rep) | |
1121 | return -ENOMEM; | |
1122 | ||
1123 | msg.skb = rep; | |
1124 | msg.portid = info->snd_portid; | |
1125 | msg.seq = info->snd_seq; | |
1126 | ||
1127 | rtnl_lock(); | |
1128 | media = tipc_media_find(name); | |
1129 | if (!media) { | |
1130 | err = -EINVAL; | |
1131 | goto err_out; | |
1132 | } | |
1133 | ||
f2f67390 | 1134 | err = __tipc_nl_add_media(&msg, media, 0); |
46f15c67 RA |
1135 | if (err) |
1136 | goto err_out; | |
1137 | rtnl_unlock(); | |
1138 | ||
1139 | return genlmsg_reply(rep, info); | |
1140 | err_out: | |
1141 | rtnl_unlock(); | |
1142 | nlmsg_free(rep); | |
1143 | ||
1144 | return err; | |
1145 | } | |
1e55417d | 1146 | |
07ffb223 | 1147 | int __tipc_nl_media_set(struct sk_buff *skb, struct genl_info *info) |
1e55417d RA |
1148 | { |
1149 | int err; | |
1150 | char *name; | |
1151 | struct tipc_media *m; | |
1152 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
1153 | ||
1154 | if (!info->attrs[TIPC_NLA_MEDIA]) | |
1155 | return -EINVAL; | |
1156 | ||
1157 | err = nla_parse_nested(attrs, TIPC_NLA_MEDIA_MAX, | |
1158 | info->attrs[TIPC_NLA_MEDIA], | |
fe52145f | 1159 | tipc_nl_media_policy, info->extack); |
1e55417d RA |
1160 | |
1161 | if (!attrs[TIPC_NLA_MEDIA_NAME]) | |
1162 | return -EINVAL; | |
1163 | name = nla_data(attrs[TIPC_NLA_MEDIA_NAME]); | |
1164 | ||
1e55417d | 1165 | m = tipc_media_find(name); |
07ffb223 | 1166 | if (!m) |
1e55417d | 1167 | return -EINVAL; |
1e55417d RA |
1168 | |
1169 | if (attrs[TIPC_NLA_MEDIA_PROP]) { | |
1170 | struct nlattr *props[TIPC_NLA_PROP_MAX + 1]; | |
1171 | ||
1172 | err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_MEDIA_PROP], | |
1173 | props); | |
07ffb223 | 1174 | if (err) |
1e55417d | 1175 | return err; |
1e55417d RA |
1176 | |
1177 | if (props[TIPC_NLA_PROP_TOL]) | |
1178 | m->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]); | |
1179 | if (props[TIPC_NLA_PROP_PRIO]) | |
1180 | m->priority = nla_get_u32(props[TIPC_NLA_PROP_PRIO]); | |
1181 | if (props[TIPC_NLA_PROP_WIN]) | |
1182 | m->window = nla_get_u32(props[TIPC_NLA_PROP_WIN]); | |
901271e0 GM |
1183 | if (props[TIPC_NLA_PROP_MTU]) { |
1184 | if (m->type_id != TIPC_MEDIA_TYPE_UDP) | |
1185 | return -EINVAL; | |
1186 | #ifdef CONFIG_TIPC_MEDIA_UDP | |
1187 | if (tipc_udp_mtu_bad(nla_get_u32 | |
1188 | (props[TIPC_NLA_PROP_MTU]))) | |
1189 | return -EINVAL; | |
1190 | m->mtu = nla_get_u32(props[TIPC_NLA_PROP_MTU]); | |
1191 | #endif | |
1192 | } | |
1e55417d | 1193 | } |
1e55417d RA |
1194 | |
1195 | return 0; | |
1196 | } | |
07ffb223 YX |
1197 | |
1198 | int tipc_nl_media_set(struct sk_buff *skb, struct genl_info *info) | |
1199 | { | |
1200 | int err; | |
1201 | ||
1202 | rtnl_lock(); | |
1203 | err = __tipc_nl_media_set(skb, info); | |
1204 | rtnl_unlock(); | |
1205 | ||
1206 | return err; | |
1207 | } |