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