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Commit | Line | Data |
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b97bf3fd PL |
1 | /* |
2 | * net/tipc/bearer.c: TIPC bearer code | |
c4307285 | 3 | * |
35c55c98 | 4 | * Copyright (c) 1996-2006, 2013-2016, Ericsson AB |
e4d050cb | 5 | * Copyright (c) 2004-2006, 2010-2013, Wind River Systems |
b97bf3fd PL |
6 | * All rights reserved. |
7 | * | |
9ea1fd3c | 8 | * Redistribution and use in source and binary forms, with or without |
b97bf3fd PL |
9 | * modification, are permitted provided that the following conditions are met: |
10 | * | |
9ea1fd3c PL |
11 | * 1. Redistributions of source code must retain the above copyright |
12 | * notice, this list of conditions and the following disclaimer. | |
13 | * 2. Redistributions in binary form must reproduce the above copyright | |
14 | * notice, this list of conditions and the following disclaimer in the | |
15 | * documentation and/or other materials provided with the distribution. | |
16 | * 3. Neither the names of the copyright holders nor the names of its | |
17 | * contributors may be used to endorse or promote products derived from | |
18 | * this software without specific prior written permission. | |
b97bf3fd | 19 | * |
9ea1fd3c PL |
20 | * Alternatively, this software may be distributed under the terms of the |
21 | * GNU General Public License ("GPL") version 2 as published by the Free | |
22 | * Software Foundation. | |
23 | * | |
24 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" | |
25 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
26 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
27 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE | |
28 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
29 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
30 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | |
31 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | |
32 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
33 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
b97bf3fd PL |
34 | * POSSIBILITY OF SUCH DAMAGE. |
35 | */ | |
36 | ||
7f9f95d9 | 37 | #include <net/sock.h> |
b97bf3fd | 38 | #include "core.h" |
b97bf3fd | 39 | #include "bearer.h" |
0655f6a8 | 40 | #include "link.h" |
b97bf3fd | 41 | #include "discover.h" |
35c55c98 | 42 | #include "monitor.h" |
1da46568 | 43 | #include "bcast.h" |
49cc66ea | 44 | #include "netlink.h" |
ef20cd4d | 45 | #include "udp_media.h" |
cf5f55f7 | 46 | #include "trace.h" |
fc1b6d6d | 47 | #include "crypto.h" |
b97bf3fd | 48 | |
a29a194a | 49 | #define MAX_ADDR_STR 60 |
b97bf3fd | 50 | |
ef72a7e0 | 51 | static struct tipc_media * const media_info_array[] = { |
5702dbab JPM |
52 | ð_media_info, |
53 | #ifdef CONFIG_TIPC_MEDIA_IB | |
54 | &ib_media_info, | |
d0f91938 EH |
55 | #endif |
56 | #ifdef CONFIG_TIPC_MEDIA_UDP | |
57 | &udp_media_info, | |
5702dbab JPM |
58 | #endif |
59 | NULL | |
60 | }; | |
b97bf3fd | 61 | |
0d051bf9 JPM |
62 | static struct tipc_bearer *bearer_get(struct net *net, int bearer_id) |
63 | { | |
64 | struct tipc_net *tn = tipc_net(net); | |
65 | ||
30a4616c | 66 | return rcu_dereference(tn->bearer_list[bearer_id]); |
0d051bf9 JPM |
67 | } |
68 | ||
1a90632d | 69 | static void bearer_disable(struct net *net, struct tipc_bearer *b); |
d55c60eb PB |
70 | static int tipc_l2_rcv_msg(struct sk_buff *skb, struct net_device *dev, |
71 | struct packet_type *pt, struct net_device *orig_dev); | |
3a777ff8 | 72 | |
b97bf3fd | 73 | /** |
5c216e1d | 74 | * tipc_media_find - locates specified media object by name |
b97bf3fd | 75 | */ |
358a0d1c | 76 | struct tipc_media *tipc_media_find(const char *name) |
b97bf3fd | 77 | { |
b97bf3fd PL |
78 | u32 i; |
79 | ||
ef72a7e0 JPM |
80 | for (i = 0; media_info_array[i] != NULL; i++) { |
81 | if (!strcmp(media_info_array[i]->name, name)) | |
5702dbab | 82 | break; |
b97bf3fd | 83 | } |
ef72a7e0 | 84 | return media_info_array[i]; |
b97bf3fd PL |
85 | } |
86 | ||
c79be454 AS |
87 | /** |
88 | * media_find_id - locates specified media object by type identifier | |
89 | */ | |
358a0d1c | 90 | static struct tipc_media *media_find_id(u8 type) |
c79be454 AS |
91 | { |
92 | u32 i; | |
93 | ||
ef72a7e0 JPM |
94 | for (i = 0; media_info_array[i] != NULL; i++) { |
95 | if (media_info_array[i]->type_id == type) | |
5702dbab | 96 | break; |
c79be454 | 97 | } |
ef72a7e0 | 98 | return media_info_array[i]; |
b97bf3fd PL |
99 | } |
100 | ||
101 | /** | |
4323add6 | 102 | * tipc_media_addr_printf - record media address in print buffer |
b97bf3fd | 103 | */ |
b4b9771b | 104 | int tipc_media_addr_printf(char *buf, int len, struct tipc_media_addr *a) |
b97bf3fd | 105 | { |
c61b666e | 106 | char addr_str[MAX_ADDR_STR]; |
1a90632d | 107 | struct tipc_media *m; |
dc1aed37 | 108 | int ret; |
b97bf3fd | 109 | |
1a90632d | 110 | m = media_find_id(a->media_id); |
b97bf3fd | 111 | |
1a90632d JPM |
112 | if (m && !m->addr2str(a, addr_str, sizeof(addr_str))) |
113 | ret = scnprintf(buf, len, "%s(%s)", m->name, addr_str); | |
c61b666e | 114 | else { |
c61b666e | 115 | u32 i; |
b97bf3fd | 116 | |
941787b8 | 117 | ret = scnprintf(buf, len, "UNKNOWN(%u)", a->media_id); |
3d749a6a | 118 | for (i = 0; i < sizeof(a->value); i++) |
b4b9771b TL |
119 | ret += scnprintf(buf + ret, len - ret, |
120 | "-%x", a->value[i]); | |
b97bf3fd | 121 | } |
b4b9771b | 122 | return ret; |
b97bf3fd PL |
123 | } |
124 | ||
b97bf3fd PL |
125 | /** |
126 | * bearer_name_validate - validate & (optionally) deconstruct bearer name | |
2c53040f BH |
127 | * @name: ptr to bearer name string |
128 | * @name_parts: ptr to area for bearer name components (or NULL if not needed) | |
c4307285 | 129 | * |
b97bf3fd PL |
130 | * Returns 1 if bearer name is valid, otherwise 0. |
131 | */ | |
c4307285 | 132 | static int bearer_name_validate(const char *name, |
f19765f4 | 133 | struct tipc_bearer_names *name_parts) |
b97bf3fd PL |
134 | { |
135 | char name_copy[TIPC_MAX_BEARER_NAME]; | |
136 | char *media_name; | |
137 | char *if_name; | |
138 | u32 media_len; | |
139 | u32 if_len; | |
140 | ||
141 | /* copy bearer name & ensure length is OK */ | |
b97bf3fd PL |
142 | name_copy[TIPC_MAX_BEARER_NAME - 1] = 0; |
143 | /* need above in case non-Posix strncpy() doesn't pad with nulls */ | |
144 | strncpy(name_copy, name, TIPC_MAX_BEARER_NAME); | |
145 | if (name_copy[TIPC_MAX_BEARER_NAME - 1] != 0) | |
146 | return 0; | |
147 | ||
148 | /* ensure all component parts of bearer name are present */ | |
b97bf3fd | 149 | media_name = name_copy; |
2db9983a AS |
150 | if_name = strchr(media_name, ':'); |
151 | if (if_name == NULL) | |
b97bf3fd PL |
152 | return 0; |
153 | *(if_name++) = 0; | |
154 | media_len = if_name - media_name; | |
155 | if_len = strlen(if_name) + 1; | |
156 | ||
157 | /* validate component parts of bearer name */ | |
c4307285 | 158 | if ((media_len <= 1) || (media_len > TIPC_MAX_MEDIA_NAME) || |
fc073938 | 159 | (if_len <= 1) || (if_len > TIPC_MAX_IF_NAME)) |
b97bf3fd PL |
160 | return 0; |
161 | ||
162 | /* return bearer name components, if necessary */ | |
b97bf3fd PL |
163 | if (name_parts) { |
164 | strcpy(name_parts->media_name, media_name); | |
165 | strcpy(name_parts->if_name, if_name); | |
166 | } | |
167 | return 1; | |
168 | } | |
169 | ||
170 | /** | |
5c216e1d | 171 | * tipc_bearer_find - locates bearer object with matching bearer name |
b97bf3fd | 172 | */ |
7f9f95d9 | 173 | struct tipc_bearer *tipc_bearer_find(struct net *net, const char *name) |
b97bf3fd | 174 | { |
7f9f95d9 | 175 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
1a90632d | 176 | struct tipc_bearer *b; |
b97bf3fd PL |
177 | u32 i; |
178 | ||
3874ccbb | 179 | for (i = 0; i < MAX_BEARERS; i++) { |
1a90632d JPM |
180 | b = rtnl_dereference(tn->bearer_list[i]); |
181 | if (b && (!strcmp(b->name, name))) | |
182 | return b; | |
b97bf3fd | 183 | } |
1fc54d8f | 184 | return NULL; |
b97bf3fd PL |
185 | } |
186 | ||
ff0d3e78 PB |
187 | /* tipc_bearer_get_name - get the bearer name from its id. |
188 | * @net: network namespace | |
189 | * @name: a pointer to the buffer where the name will be stored. | |
190 | * @bearer_id: the id to get the name from. | |
191 | */ | |
192 | int tipc_bearer_get_name(struct net *net, char *name, u32 bearer_id) | |
193 | { | |
194 | struct tipc_net *tn = tipc_net(net); | |
195 | struct tipc_bearer *b; | |
196 | ||
197 | if (bearer_id >= MAX_BEARERS) | |
198 | return -EINVAL; | |
199 | ||
200 | b = rtnl_dereference(tn->bearer_list[bearer_id]); | |
201 | if (!b) | |
202 | return -EINVAL; | |
203 | ||
204 | strcpy(name, b->name); | |
205 | return 0; | |
206 | } | |
207 | ||
7f9f95d9 | 208 | void tipc_bearer_add_dest(struct net *net, u32 bearer_id, u32 dest) |
b97bf3fd | 209 | { |
7f9f95d9 | 210 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
1a90632d | 211 | struct tipc_bearer *b; |
7a2f7d18 YX |
212 | |
213 | rcu_read_lock(); | |
30a4616c | 214 | b = rcu_dereference(tn->bearer_list[bearer_id]); |
1a90632d | 215 | if (b) |
b39e465e | 216 | tipc_disc_add_dest(b->disc); |
7a2f7d18 | 217 | rcu_read_unlock(); |
b97bf3fd PL |
218 | } |
219 | ||
7f9f95d9 | 220 | void tipc_bearer_remove_dest(struct net *net, u32 bearer_id, u32 dest) |
b97bf3fd | 221 | { |
7f9f95d9 | 222 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
1a90632d | 223 | struct tipc_bearer *b; |
7a2f7d18 YX |
224 | |
225 | rcu_read_lock(); | |
30a4616c | 226 | b = rcu_dereference(tn->bearer_list[bearer_id]); |
1a90632d | 227 | if (b) |
b39e465e | 228 | tipc_disc_remove_dest(b->disc); |
7a2f7d18 | 229 | rcu_read_unlock(); |
b97bf3fd PL |
230 | } |
231 | ||
b97bf3fd PL |
232 | /** |
233 | * tipc_enable_bearer - enable bearer with the given name | |
c4307285 | 234 | */ |
9ab15465 | 235 | static int tipc_enable_bearer(struct net *net, const char *name, |
cb30a633 | 236 | u32 disc_domain, u32 prio, |
d0f91938 | 237 | struct nlattr *attr[]) |
b97bf3fd | 238 | { |
cb30a633 JM |
239 | struct tipc_net *tn = tipc_net(net); |
240 | struct tipc_bearer_names b_names; | |
cb30a633 | 241 | int with_this_prio = 1; |
1a90632d JPM |
242 | struct tipc_bearer *b; |
243 | struct tipc_media *m; | |
4e801fa1 | 244 | struct sk_buff *skb; |
cb30a633 | 245 | int bearer_id = 0; |
b97bf3fd | 246 | int res = -EINVAL; |
cb30a633 | 247 | char *errstr = ""; |
b97bf3fd | 248 | |
f19765f4 | 249 | if (!bearer_name_validate(name, &b_names)) { |
cb30a633 JM |
250 | errstr = "illegal name"; |
251 | goto rejected; | |
a10bd924 | 252 | } |
cb30a633 | 253 | |
cb30a633 JM |
254 | if (prio > TIPC_MAX_LINK_PRI && prio != TIPC_MEDIA_LINK_PRI) { |
255 | errstr = "illegal priority"; | |
256 | goto rejected; | |
a10bd924 | 257 | } |
b97bf3fd | 258 | |
1a90632d JPM |
259 | m = tipc_media_find(b_names.media_name); |
260 | if (!m) { | |
cb30a633 JM |
261 | errstr = "media not registered"; |
262 | goto rejected; | |
b97bf3fd | 263 | } |
16cb4b33 | 264 | |
cb30a633 JM |
265 | if (prio == TIPC_MEDIA_LINK_PRI) |
266 | prio = m->priority; | |
b97bf3fd | 267 | |
cb30a633 JM |
268 | /* Check new bearer vs existing ones and find free bearer id if any */ |
269 | while (bearer_id < MAX_BEARERS) { | |
270 | b = rtnl_dereference(tn->bearer_list[bearer_id]); | |
271 | if (!b) | |
272 | break; | |
1a90632d | 273 | if (!strcmp(name, b->name)) { |
cb30a633 JM |
274 | errstr = "already enabled"; |
275 | goto rejected; | |
b97bf3fd | 276 | } |
cb30a633 JM |
277 | bearer_id++; |
278 | if (b->priority != prio) | |
279 | continue; | |
280 | if (++with_this_prio <= 2) | |
281 | continue; | |
282 | pr_warn("Bearer <%s>: already 2 bearers with priority %u\n", | |
283 | name, prio); | |
284 | if (prio == TIPC_MIN_LINK_PRI) { | |
285 | errstr = "cannot adjust to lower"; | |
286 | goto rejected; | |
b97bf3fd | 287 | } |
cb30a633 JM |
288 | pr_warn("Bearer <%s>: trying with adjusted priority\n", name); |
289 | prio--; | |
290 | bearer_id = 0; | |
291 | with_this_prio = 1; | |
b97bf3fd | 292 | } |
cb30a633 | 293 | |
b97bf3fd | 294 | if (bearer_id >= MAX_BEARERS) { |
cb30a633 JM |
295 | errstr = "max 3 bearers permitted"; |
296 | goto rejected; | |
b97bf3fd PL |
297 | } |
298 | ||
1a90632d JPM |
299 | b = kzalloc(sizeof(*b), GFP_ATOMIC); |
300 | if (!b) | |
7216cd94 YX |
301 | return -ENOMEM; |
302 | ||
1a90632d JPM |
303 | strcpy(b->name, name); |
304 | b->media = m; | |
305 | res = m->enable_media(net, b, attr); | |
b97bf3fd | 306 | if (res) { |
19142551 | 307 | kfree(b); |
cb30a633 JM |
308 | errstr = "failed to enable media"; |
309 | goto rejected; | |
b97bf3fd PL |
310 | } |
311 | ||
1a90632d JPM |
312 | b->identity = bearer_id; |
313 | b->tolerance = m->tolerance; | |
314 | b->window = m->window; | |
315 | b->domain = disc_domain; | |
316 | b->net_plane = bearer_id + 'A'; | |
cb30a633 | 317 | b->priority = prio; |
0d051bf9 | 318 | test_and_set_bit_lock(0, &b->up); |
2a7ee696 | 319 | refcount_set(&b->refcnt, 1); |
3a777ff8 | 320 | |
4e801fa1 | 321 | res = tipc_disc_create(net, b, &b->bcast_addr, &skb); |
3a777ff8 | 322 | if (res) { |
1a90632d | 323 | bearer_disable(net, b); |
cb30a633 JM |
324 | errstr = "failed to create discoverer"; |
325 | goto rejected; | |
3a777ff8 | 326 | } |
3874ccbb | 327 | |
1a90632d | 328 | rcu_assign_pointer(tn->bearer_list[bearer_id], b); |
4e801fa1 JPM |
329 | if (skb) |
330 | tipc_bearer_xmit_skb(net, bearer_id, skb, &b->bcast_addr); | |
35c55c98 | 331 | |
19142551 TR |
332 | if (tipc_mon_create(net, bearer_id)) { |
333 | bearer_disable(net, b); | |
35c55c98 | 334 | return -ENOMEM; |
19142551 | 335 | } |
35c55c98 | 336 | |
20263641 JM |
337 | pr_info("Enabled bearer <%s>, priority %u\n", name, prio); |
338 | ||
cb30a633 JM |
339 | return res; |
340 | rejected: | |
20263641 | 341 | pr_warn("Enabling of bearer <%s> rejected, %s\n", name, errstr); |
b97bf3fd PL |
342 | return res; |
343 | } | |
344 | ||
345 | /** | |
512137ee | 346 | * tipc_reset_bearer - Reset all links established over this bearer |
b97bf3fd | 347 | */ |
1a90632d | 348 | static int tipc_reset_bearer(struct net *net, struct tipc_bearer *b) |
b97bf3fd | 349 | { |
1a90632d JPM |
350 | pr_info("Resetting bearer <%s>\n", b->name); |
351 | tipc_node_delete_links(net, b->identity); | |
352 | tipc_disc_reset(net, b); | |
0e35fd5e | 353 | return 0; |
b97bf3fd PL |
354 | } |
355 | ||
2a7ee696 TL |
356 | bool tipc_bearer_hold(struct tipc_bearer *b) |
357 | { | |
358 | return (b && refcount_inc_not_zero(&b->refcnt)); | |
359 | } | |
360 | ||
361 | void tipc_bearer_put(struct tipc_bearer *b) | |
362 | { | |
363 | if (b && refcount_dec_and_test(&b->refcnt)) | |
364 | kfree_rcu(b, rcu); | |
365 | } | |
366 | ||
b97bf3fd | 367 | /** |
617d3c7a | 368 | * bearer_disable |
c4307285 | 369 | * |
7216cd94 | 370 | * Note: This routine assumes caller holds RTNL lock. |
b97bf3fd | 371 | */ |
1a90632d | 372 | static void bearer_disable(struct net *net, struct tipc_bearer *b) |
b97bf3fd | 373 | { |
5b7066c3 JPM |
374 | struct tipc_net *tn = tipc_net(net); |
375 | int bearer_id = b->identity; | |
3874ccbb | 376 | |
1a90632d | 377 | pr_info("Disabling bearer <%s>\n", b->name); |
0d051bf9 | 378 | clear_bit_unlock(0, &b->up); |
5b7066c3 | 379 | tipc_node_delete_links(net, bearer_id); |
0d051bf9 | 380 | b->media->disable_media(b); |
1a90632d | 381 | RCU_INIT_POINTER(b->media_ptr, NULL); |
b39e465e JM |
382 | if (b->disc) |
383 | tipc_disc_delete(b->disc); | |
5b7066c3 | 384 | RCU_INIT_POINTER(tn->bearer_list[bearer_id], NULL); |
2a7ee696 | 385 | tipc_bearer_put(b); |
35c55c98 | 386 | tipc_mon_delete(net, bearer_id); |
b97bf3fd PL |
387 | } |
388 | ||
d0f91938 EH |
389 | int tipc_enable_l2_media(struct net *net, struct tipc_bearer *b, |
390 | struct nlattr *attr[]) | |
e4d050cb | 391 | { |
52dfae5c JM |
392 | char *dev_name = strchr((const char *)b->name, ':') + 1; |
393 | int hwaddr_len = b->media->hwaddr_len; | |
394 | u8 node_id[NODE_ID_LEN] = {0,}; | |
e4d050cb | 395 | struct net_device *dev; |
e4d050cb YX |
396 | |
397 | /* Find device with specified name */ | |
52dfae5c | 398 | dev = dev_get_by_name(net, dev_name); |
e4d050cb YX |
399 | if (!dev) |
400 | return -ENODEV; | |
3de81b75 MK |
401 | if (tipc_mtu_bad(dev, 0)) { |
402 | dev_put(dev); | |
403 | return -EINVAL; | |
404 | } | |
6c9081a3 JR |
405 | if (dev == net->loopback_dev) { |
406 | dev_put(dev); | |
407 | pr_info("Enabling <%s> not permitted\n", b->name); | |
408 | return -EINVAL; | |
409 | } | |
e4d050cb | 410 | |
52dfae5c JM |
411 | /* Autoconfigure own node identity if needed */ |
412 | if (!tipc_own_id(net) && hwaddr_len <= NODE_ID_LEN) { | |
413 | memcpy(node_id, dev->dev_addr, hwaddr_len); | |
414 | tipc_net_init(net, node_id, 0); | |
415 | } | |
416 | if (!tipc_own_id(net)) { | |
63135ee0 | 417 | dev_put(dev); |
52dfae5c JM |
418 | pr_warn("Failed to obtain node identity\n"); |
419 | return -EINVAL; | |
420 | } | |
421 | ||
38504c28 | 422 | /* Associate TIPC bearer with L2 bearer */ |
2231c5af | 423 | rcu_assign_pointer(b->media_ptr, dev); |
d55c60eb PB |
424 | b->pt.dev = dev; |
425 | b->pt.type = htons(ETH_P_TIPC); | |
426 | b->pt.func = tipc_l2_rcv_msg; | |
427 | dev_add_pack(&b->pt); | |
38504c28 | 428 | memset(&b->bcast_addr, 0, sizeof(b->bcast_addr)); |
52dfae5c | 429 | memcpy(b->bcast_addr.value, dev->broadcast, hwaddr_len); |
e4d050cb | 430 | b->bcast_addr.media_id = b->media->type_id; |
9999974a | 431 | b->bcast_addr.broadcast = TIPC_BROADCAST_SUPPORT; |
e4d050cb | 432 | b->mtu = dev->mtu; |
38504c28 | 433 | b->media->raw2addr(b, &b->addr, (char *)dev->dev_addr); |
e4d050cb YX |
434 | rcu_assign_pointer(dev->tipc_ptr, b); |
435 | return 0; | |
436 | } | |
437 | ||
38504c28 | 438 | /* tipc_disable_l2_media - detach TIPC bearer from an L2 interface |
e4d050cb | 439 | * |
282b3a05 | 440 | * Mark L2 bearer as inactive so that incoming buffers are thrown away |
e4d050cb YX |
441 | */ |
442 | void tipc_disable_l2_media(struct tipc_bearer *b) | |
443 | { | |
2231c5af YX |
444 | struct net_device *dev; |
445 | ||
446 | dev = (struct net_device *)rtnl_dereference(b->media_ptr); | |
d55c60eb | 447 | dev_remove_pack(&b->pt); |
e4d050cb | 448 | RCU_INIT_POINTER(dev->tipc_ptr, NULL); |
f1c8d8cb | 449 | synchronize_net(); |
e4d050cb YX |
450 | dev_put(dev); |
451 | } | |
452 | ||
453 | /** | |
38504c28 | 454 | * tipc_l2_send_msg - send a TIPC packet out over an L2 interface |
5b7066c3 | 455 | * @skb: the packet to be sent |
1a90632d | 456 | * @b: the bearer through which the packet is to be sent |
e4d050cb YX |
457 | * @dest: peer destination address |
458 | */ | |
7214bcf8 | 459 | int tipc_l2_send_msg(struct net *net, struct sk_buff *skb, |
1da46568 | 460 | struct tipc_bearer *b, struct tipc_media_addr *dest) |
e4d050cb | 461 | { |
2231c5af | 462 | struct net_device *dev; |
e4d050cb | 463 | int delta; |
2231c5af | 464 | |
30a4616c | 465 | dev = (struct net_device *)rcu_dereference(b->media_ptr); |
2231c5af YX |
466 | if (!dev) |
467 | return 0; | |
e4d050cb | 468 | |
0d051bf9 JPM |
469 | delta = SKB_DATA_ALIGN(dev->hard_header_len - skb_headroom(skb)); |
470 | if ((delta > 0) && pskb_expand_head(skb, delta, 0, GFP_ATOMIC)) { | |
471 | kfree_skb(skb); | |
472 | return 0; | |
473 | } | |
7214bcf8 JPM |
474 | skb_reset_network_header(skb); |
475 | skb->dev = dev; | |
476 | skb->protocol = htons(ETH_P_TIPC); | |
477 | dev_hard_header(skb, dev, ETH_P_TIPC, dest->value, | |
478 | dev->dev_addr, skb->len); | |
479 | dev_queue_xmit(skb); | |
e4d050cb YX |
480 | return 0; |
481 | } | |
482 | ||
9999974a JPM |
483 | bool tipc_bearer_bcast_support(struct net *net, u32 bearer_id) |
484 | { | |
485 | bool supp = false; | |
486 | struct tipc_bearer *b; | |
487 | ||
488 | rcu_read_lock(); | |
489 | b = bearer_get(net, bearer_id); | |
490 | if (b) | |
491 | supp = (b->bcast_addr.broadcast == TIPC_BROADCAST_SUPPORT); | |
492 | rcu_read_unlock(); | |
493 | return supp; | |
494 | } | |
495 | ||
959e1781 JPM |
496 | int tipc_bearer_mtu(struct net *net, u32 bearer_id) |
497 | { | |
498 | int mtu = 0; | |
499 | struct tipc_bearer *b; | |
500 | ||
501 | rcu_read_lock(); | |
30a4616c | 502 | b = rcu_dereference(tipc_net(net)->bearer_list[bearer_id]); |
959e1781 JPM |
503 | if (b) |
504 | mtu = b->mtu; | |
505 | rcu_read_unlock(); | |
506 | return mtu; | |
507 | } | |
508 | ||
60852d67 JPM |
509 | /* tipc_bearer_xmit_skb - sends buffer to destination over bearer |
510 | */ | |
511 | void tipc_bearer_xmit_skb(struct net *net, u32 bearer_id, | |
512 | struct sk_buff *skb, | |
513 | struct tipc_media_addr *dest) | |
514 | { | |
0d051bf9 | 515 | struct tipc_msg *hdr = buf_msg(skb); |
60852d67 JPM |
516 | struct tipc_bearer *b; |
517 | ||
518 | rcu_read_lock(); | |
0d051bf9 | 519 | b = bearer_get(net, bearer_id); |
fc1b6d6d TL |
520 | if (likely(b && (test_bit(0, &b->up) || msg_is_reset(hdr)))) { |
521 | #ifdef CONFIG_TIPC_CRYPTO | |
522 | tipc_crypto_xmit(net, &skb, b, dest, NULL); | |
523 | if (skb) | |
524 | #endif | |
525 | b->media->send_msg(net, skb, b, dest); | |
526 | } else { | |
4e801fa1 | 527 | kfree_skb(skb); |
fc1b6d6d | 528 | } |
60852d67 | 529 | rcu_read_unlock(); |
60852d67 JPM |
530 | } |
531 | ||
af9b028e JPM |
532 | /* tipc_bearer_xmit() -send buffer to destination over bearer |
533 | */ | |
534 | void tipc_bearer_xmit(struct net *net, u32 bearer_id, | |
535 | struct sk_buff_head *xmitq, | |
fc1b6d6d TL |
536 | struct tipc_media_addr *dst, |
537 | struct tipc_node *__dnode) | |
af9b028e | 538 | { |
af9b028e JPM |
539 | struct tipc_bearer *b; |
540 | struct sk_buff *skb, *tmp; | |
541 | ||
542 | if (skb_queue_empty(xmitq)) | |
543 | return; | |
544 | ||
545 | rcu_read_lock(); | |
0d051bf9 | 546 | b = bearer_get(net, bearer_id); |
4e801fa1 JPM |
547 | if (unlikely(!b)) |
548 | __skb_queue_purge(xmitq); | |
549 | skb_queue_walk_safe(xmitq, skb, tmp) { | |
550 | __skb_dequeue(xmitq); | |
fc1b6d6d TL |
551 | if (likely(test_bit(0, &b->up) || msg_is_reset(buf_msg(skb)))) { |
552 | #ifdef CONFIG_TIPC_CRYPTO | |
553 | tipc_crypto_xmit(net, &skb, b, dst, __dnode); | |
554 | if (skb) | |
555 | #endif | |
556 | b->media->send_msg(net, skb, b, dst); | |
557 | } else { | |
5128b185 | 558 | kfree_skb(skb); |
fc1b6d6d | 559 | } |
b06b281e JPM |
560 | } |
561 | rcu_read_unlock(); | |
562 | } | |
563 | ||
564 | /* tipc_bearer_bc_xmit() - broadcast buffers to all destinations | |
565 | */ | |
566 | void tipc_bearer_bc_xmit(struct net *net, u32 bearer_id, | |
567 | struct sk_buff_head *xmitq) | |
568 | { | |
569 | struct tipc_net *tn = tipc_net(net); | |
fc1b6d6d | 570 | struct tipc_media_addr *dst; |
b06b281e JPM |
571 | int net_id = tn->net_id; |
572 | struct tipc_bearer *b; | |
573 | struct sk_buff *skb, *tmp; | |
574 | struct tipc_msg *hdr; | |
575 | ||
576 | rcu_read_lock(); | |
0d051bf9 JPM |
577 | b = bearer_get(net, bearer_id); |
578 | if (unlikely(!b || !test_bit(0, &b->up))) | |
4e801fa1 JPM |
579 | __skb_queue_purge(xmitq); |
580 | skb_queue_walk_safe(xmitq, skb, tmp) { | |
581 | hdr = buf_msg(skb); | |
582 | msg_set_non_seq(hdr, 1); | |
583 | msg_set_mc_netid(hdr, net_id); | |
584 | __skb_dequeue(xmitq); | |
fc1b6d6d TL |
585 | dst = &b->bcast_addr; |
586 | #ifdef CONFIG_TIPC_CRYPTO | |
587 | tipc_crypto_xmit(net, &skb, b, dst, NULL); | |
588 | if (skb) | |
589 | #endif | |
590 | b->media->send_msg(net, skb, b, dst); | |
af9b028e JPM |
591 | } |
592 | rcu_read_unlock(); | |
593 | } | |
594 | ||
6e967adf YX |
595 | /** |
596 | * tipc_l2_rcv_msg - handle incoming TIPC message from an interface | |
597 | * @buf: the received packet | |
598 | * @dev: the net device that the packet was received on | |
599 | * @pt: the packet_type structure which was used to register this handler | |
600 | * @orig_dev: the original receive net device in case the device is a bond | |
601 | * | |
602 | * Accept only packets explicitly sent to this node, or broadcast packets; | |
603 | * ignores packets sent using interface multicast, and traffic sent to other | |
604 | * nodes (which can happen if interface is running in promiscuous mode). | |
605 | */ | |
4e801fa1 | 606 | static int tipc_l2_rcv_msg(struct sk_buff *skb, struct net_device *dev, |
6e967adf YX |
607 | struct packet_type *pt, struct net_device *orig_dev) |
608 | { | |
1a90632d | 609 | struct tipc_bearer *b; |
6e967adf | 610 | |
6e967adf | 611 | rcu_read_lock(); |
30a4616c XL |
612 | b = rcu_dereference(dev->tipc_ptr) ?: |
613 | rcu_dereference(orig_dev->tipc_ptr); | |
0d051bf9 | 614 | if (likely(b && test_bit(0, &b->up) && |
fed5f571 | 615 | (skb->pkt_type <= PACKET_MULTICAST))) { |
a8305bff | 616 | skb_mark_not_on_list(skb); |
fc1b6d6d | 617 | TIPC_SKB_CB(skb)->flags = 0; |
d55c60eb | 618 | tipc_rcv(dev_net(b->pt.dev), skb, b); |
4e801fa1 JPM |
619 | rcu_read_unlock(); |
620 | return NET_RX_SUCCESS; | |
6e967adf YX |
621 | } |
622 | rcu_read_unlock(); | |
4e801fa1 | 623 | kfree_skb(skb); |
6e967adf YX |
624 | return NET_RX_DROP; |
625 | } | |
626 | ||
627 | /** | |
628 | * tipc_l2_device_event - handle device events from network device | |
629 | * @nb: the context of the notification | |
630 | * @evt: the type of event | |
631 | * @ptr: the net device that the event was on | |
632 | * | |
633 | * This function is called by the Ethernet driver in case of link | |
634 | * change event. | |
635 | */ | |
636 | static int tipc_l2_device_event(struct notifier_block *nb, unsigned long evt, | |
637 | void *ptr) | |
638 | { | |
6e967adf | 639 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
c93d3baa | 640 | struct net *net = dev_net(dev); |
1a90632d | 641 | struct tipc_bearer *b; |
6e967adf | 642 | |
1a90632d JPM |
643 | b = rtnl_dereference(dev->tipc_ptr); |
644 | if (!b) | |
6e967adf | 645 | return NOTIFY_DONE; |
6e967adf | 646 | |
cf5f55f7 | 647 | trace_tipc_l2_device_event(dev, b, evt); |
6e967adf YX |
648 | switch (evt) { |
649 | case NETDEV_CHANGE: | |
94b6ddce PB |
650 | if (netif_carrier_ok(dev) && netif_oper_up(dev)) { |
651 | test_and_set_bit_lock(0, &b->up); | |
6e967adf | 652 | break; |
94b6ddce PB |
653 | } |
654 | /* fall through */ | |
282b3a05 | 655 | case NETDEV_GOING_DOWN: |
0d051bf9 | 656 | clear_bit_unlock(0, &b->up); |
5b7066c3 JPM |
657 | tipc_reset_bearer(net, b); |
658 | break; | |
94b6ddce PB |
659 | case NETDEV_UP: |
660 | test_and_set_bit_lock(0, &b->up); | |
661 | break; | |
6e967adf | 662 | case NETDEV_CHANGEMTU: |
3de81b75 MK |
663 | if (tipc_mtu_bad(dev, 0)) { |
664 | bearer_disable(net, b); | |
665 | break; | |
666 | } | |
667 | b->mtu = dev->mtu; | |
1a90632d | 668 | tipc_reset_bearer(net, b); |
a21a584d | 669 | break; |
6e967adf | 670 | case NETDEV_CHANGEADDR: |
1a90632d | 671 | b->media->raw2addr(b, &b->addr, |
5b7066c3 | 672 | (char *)dev->dev_addr); |
1a90632d | 673 | tipc_reset_bearer(net, b); |
6e967adf YX |
674 | break; |
675 | case NETDEV_UNREGISTER: | |
676 | case NETDEV_CHANGENAME: | |
8e0deed9 | 677 | bearer_disable(net, b); |
6e967adf YX |
678 | break; |
679 | } | |
6e967adf YX |
680 | return NOTIFY_OK; |
681 | } | |
682 | ||
6e967adf YX |
683 | static struct notifier_block notifier = { |
684 | .notifier_call = tipc_l2_device_event, | |
685 | .priority = 0, | |
686 | }; | |
687 | ||
688 | int tipc_bearer_setup(void) | |
689 | { | |
d55c60eb | 690 | return register_netdevice_notifier(¬ifier); |
6e967adf YX |
691 | } |
692 | ||
693 | void tipc_bearer_cleanup(void) | |
694 | { | |
695 | unregister_netdevice_notifier(¬ifier); | |
6e967adf | 696 | } |
b97bf3fd | 697 | |
f2f9800d | 698 | void tipc_bearer_stop(struct net *net) |
b97bf3fd | 699 | { |
7f9f95d9 | 700 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
1a90632d | 701 | struct tipc_bearer *b; |
b97bf3fd PL |
702 | u32 i; |
703 | ||
b97bf3fd | 704 | for (i = 0; i < MAX_BEARERS; i++) { |
1a90632d JPM |
705 | b = rtnl_dereference(tn->bearer_list[i]); |
706 | if (b) { | |
707 | bearer_disable(net, b); | |
7f9f95d9 | 708 | tn->bearer_list[i] = NULL; |
3874ccbb | 709 | } |
b97bf3fd | 710 | } |
b97bf3fd | 711 | } |
0655f6a8 | 712 | |
6c9081a3 JR |
713 | void tipc_clone_to_loopback(struct net *net, struct sk_buff_head *pkts) |
714 | { | |
715 | struct net_device *dev = net->loopback_dev; | |
716 | struct sk_buff *skb, *_skb; | |
717 | int exp; | |
718 | ||
719 | skb_queue_walk(pkts, _skb) { | |
720 | skb = pskb_copy(_skb, GFP_ATOMIC); | |
721 | if (!skb) | |
722 | continue; | |
723 | ||
724 | exp = SKB_DATA_ALIGN(dev->hard_header_len - skb_headroom(skb)); | |
725 | if (exp > 0 && pskb_expand_head(skb, exp, 0, GFP_ATOMIC)) { | |
726 | kfree_skb(skb); | |
727 | continue; | |
728 | } | |
729 | ||
730 | skb_reset_network_header(skb); | |
731 | dev_hard_header(skb, dev, ETH_P_TIPC, dev->dev_addr, | |
732 | dev->dev_addr, skb->len); | |
733 | skb->dev = dev; | |
734 | skb->pkt_type = PACKET_HOST; | |
735 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
736 | skb->protocol = eth_type_trans(skb, dev); | |
737 | netif_rx_ni(skb); | |
738 | } | |
739 | } | |
740 | ||
741 | static int tipc_loopback_rcv_pkt(struct sk_buff *skb, struct net_device *dev, | |
742 | struct packet_type *pt, struct net_device *od) | |
743 | { | |
744 | consume_skb(skb); | |
745 | return NET_RX_SUCCESS; | |
746 | } | |
747 | ||
748 | int tipc_attach_loopback(struct net *net) | |
749 | { | |
750 | struct net_device *dev = net->loopback_dev; | |
751 | struct tipc_net *tn = tipc_net(net); | |
752 | ||
753 | if (!dev) | |
754 | return -ENODEV; | |
755 | ||
756 | dev_hold(dev); | |
757 | tn->loopback_pt.dev = dev; | |
758 | tn->loopback_pt.type = htons(ETH_P_TIPC); | |
759 | tn->loopback_pt.func = tipc_loopback_rcv_pkt; | |
760 | dev_add_pack(&tn->loopback_pt); | |
761 | return 0; | |
762 | } | |
763 | ||
764 | void tipc_detach_loopback(struct net *net) | |
765 | { | |
766 | struct tipc_net *tn = tipc_net(net); | |
767 | ||
768 | dev_remove_pack(&tn->loopback_pt); | |
769 | dev_put(net->loopback_dev); | |
770 | } | |
771 | ||
35b9dd76 | 772 | /* Caller should hold rtnl_lock to protect the bearer */ |
d8182804 | 773 | static int __tipc_nl_add_bearer(struct tipc_nl_msg *msg, |
f2f67390 | 774 | struct tipc_bearer *bearer, int nlflags) |
35b9dd76 RA |
775 | { |
776 | void *hdr; | |
777 | struct nlattr *attrs; | |
778 | struct nlattr *prop; | |
779 | ||
bfb3e5dd | 780 | hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family, |
f2f67390 | 781 | nlflags, TIPC_NL_BEARER_GET); |
35b9dd76 RA |
782 | if (!hdr) |
783 | return -EMSGSIZE; | |
784 | ||
ae0be8de | 785 | attrs = nla_nest_start_noflag(msg->skb, TIPC_NLA_BEARER); |
35b9dd76 RA |
786 | if (!attrs) |
787 | goto msg_full; | |
788 | ||
789 | if (nla_put_string(msg->skb, TIPC_NLA_BEARER_NAME, bearer->name)) | |
790 | goto attr_msg_full; | |
791 | ||
ae0be8de | 792 | prop = nla_nest_start_noflag(msg->skb, TIPC_NLA_BEARER_PROP); |
35b9dd76 RA |
793 | if (!prop) |
794 | goto prop_msg_full; | |
795 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, bearer->priority)) | |
796 | goto prop_msg_full; | |
797 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, bearer->tolerance)) | |
798 | goto prop_msg_full; | |
799 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, bearer->window)) | |
800 | goto prop_msg_full; | |
682cd3cf GM |
801 | if (bearer->media->type_id == TIPC_MEDIA_TYPE_UDP) |
802 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_MTU, bearer->mtu)) | |
803 | goto prop_msg_full; | |
35b9dd76 RA |
804 | |
805 | nla_nest_end(msg->skb, prop); | |
fdb3accc RA |
806 | |
807 | #ifdef CONFIG_TIPC_MEDIA_UDP | |
808 | if (bearer->media->type_id == TIPC_MEDIA_TYPE_UDP) { | |
809 | if (tipc_udp_nl_add_bearer_data(msg, bearer)) | |
810 | goto attr_msg_full; | |
811 | } | |
812 | #endif | |
813 | ||
35b9dd76 RA |
814 | nla_nest_end(msg->skb, attrs); |
815 | genlmsg_end(msg->skb, hdr); | |
816 | ||
817 | return 0; | |
818 | ||
819 | prop_msg_full: | |
820 | nla_nest_cancel(msg->skb, prop); | |
821 | attr_msg_full: | |
822 | nla_nest_cancel(msg->skb, attrs); | |
823 | msg_full: | |
824 | genlmsg_cancel(msg->skb, hdr); | |
825 | ||
826 | return -EMSGSIZE; | |
827 | } | |
828 | ||
829 | int tipc_nl_bearer_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
830 | { | |
831 | int err; | |
832 | int i = cb->args[0]; | |
833 | struct tipc_bearer *bearer; | |
834 | struct tipc_nl_msg msg; | |
7f9f95d9 YX |
835 | struct net *net = sock_net(skb->sk); |
836 | struct tipc_net *tn = net_generic(net, tipc_net_id); | |
35b9dd76 RA |
837 | |
838 | if (i == MAX_BEARERS) | |
839 | return 0; | |
840 | ||
841 | msg.skb = skb; | |
842 | msg.portid = NETLINK_CB(cb->skb).portid; | |
843 | msg.seq = cb->nlh->nlmsg_seq; | |
844 | ||
845 | rtnl_lock(); | |
846 | for (i = 0; i < MAX_BEARERS; i++) { | |
7f9f95d9 | 847 | bearer = rtnl_dereference(tn->bearer_list[i]); |
35b9dd76 RA |
848 | if (!bearer) |
849 | continue; | |
850 | ||
f2f67390 | 851 | err = __tipc_nl_add_bearer(&msg, bearer, NLM_F_MULTI); |
35b9dd76 RA |
852 | if (err) |
853 | break; | |
854 | } | |
855 | rtnl_unlock(); | |
856 | ||
857 | cb->args[0] = i; | |
858 | return skb->len; | |
859 | } | |
860 | ||
861 | int tipc_nl_bearer_get(struct sk_buff *skb, struct genl_info *info) | |
862 | { | |
863 | int err; | |
864 | char *name; | |
865 | struct sk_buff *rep; | |
866 | struct tipc_bearer *bearer; | |
867 | struct tipc_nl_msg msg; | |
868 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
7f9f95d9 | 869 | struct net *net = genl_info_net(info); |
35b9dd76 RA |
870 | |
871 | if (!info->attrs[TIPC_NLA_BEARER]) | |
872 | return -EINVAL; | |
873 | ||
8cb08174 JB |
874 | err = nla_parse_nested_deprecated(attrs, TIPC_NLA_BEARER_MAX, |
875 | info->attrs[TIPC_NLA_BEARER], | |
876 | tipc_nl_bearer_policy, info->extack); | |
35b9dd76 RA |
877 | if (err) |
878 | return err; | |
879 | ||
880 | if (!attrs[TIPC_NLA_BEARER_NAME]) | |
881 | return -EINVAL; | |
882 | name = nla_data(attrs[TIPC_NLA_BEARER_NAME]); | |
883 | ||
884 | rep = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); | |
885 | if (!rep) | |
886 | return -ENOMEM; | |
887 | ||
888 | msg.skb = rep; | |
889 | msg.portid = info->snd_portid; | |
890 | msg.seq = info->snd_seq; | |
891 | ||
892 | rtnl_lock(); | |
7f9f95d9 | 893 | bearer = tipc_bearer_find(net, name); |
35b9dd76 RA |
894 | if (!bearer) { |
895 | err = -EINVAL; | |
896 | goto err_out; | |
897 | } | |
898 | ||
f2f67390 | 899 | err = __tipc_nl_add_bearer(&msg, bearer, 0); |
35b9dd76 RA |
900 | if (err) |
901 | goto err_out; | |
902 | rtnl_unlock(); | |
903 | ||
904 | return genlmsg_reply(rep, info); | |
905 | err_out: | |
906 | rtnl_unlock(); | |
907 | nlmsg_free(rep); | |
908 | ||
909 | return err; | |
910 | } | |
911 | ||
d59d8b77 | 912 | int __tipc_nl_bearer_disable(struct sk_buff *skb, struct genl_info *info) |
0655f6a8 RA |
913 | { |
914 | int err; | |
915 | char *name; | |
916 | struct tipc_bearer *bearer; | |
917 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
9ab15465 | 918 | struct net *net = sock_net(skb->sk); |
0655f6a8 RA |
919 | |
920 | if (!info->attrs[TIPC_NLA_BEARER]) | |
921 | return -EINVAL; | |
922 | ||
8cb08174 JB |
923 | err = nla_parse_nested_deprecated(attrs, TIPC_NLA_BEARER_MAX, |
924 | info->attrs[TIPC_NLA_BEARER], | |
925 | tipc_nl_bearer_policy, info->extack); | |
0655f6a8 RA |
926 | if (err) |
927 | return err; | |
928 | ||
929 | if (!attrs[TIPC_NLA_BEARER_NAME]) | |
930 | return -EINVAL; | |
931 | ||
932 | name = nla_data(attrs[TIPC_NLA_BEARER_NAME]); | |
933 | ||
7f9f95d9 | 934 | bearer = tipc_bearer_find(net, name); |
d59d8b77 | 935 | if (!bearer) |
0655f6a8 | 936 | return -EINVAL; |
0655f6a8 | 937 | |
b1c29f6b | 938 | bearer_disable(net, bearer); |
0655f6a8 RA |
939 | |
940 | return 0; | |
941 | } | |
942 | ||
d59d8b77 YX |
943 | int tipc_nl_bearer_disable(struct sk_buff *skb, struct genl_info *info) |
944 | { | |
945 | int err; | |
946 | ||
947 | rtnl_lock(); | |
948 | err = __tipc_nl_bearer_disable(skb, info); | |
949 | rtnl_unlock(); | |
950 | ||
951 | return err; | |
952 | } | |
953 | ||
45cf7edf | 954 | int __tipc_nl_bearer_enable(struct sk_buff *skb, struct genl_info *info) |
0655f6a8 RA |
955 | { |
956 | int err; | |
957 | char *bearer; | |
958 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
9ab15465 | 959 | struct net *net = sock_net(skb->sk); |
20263641 | 960 | u32 domain = 0; |
0655f6a8 RA |
961 | u32 prio; |
962 | ||
963 | prio = TIPC_MEDIA_LINK_PRI; | |
0655f6a8 RA |
964 | |
965 | if (!info->attrs[TIPC_NLA_BEARER]) | |
966 | return -EINVAL; | |
967 | ||
8cb08174 JB |
968 | err = nla_parse_nested_deprecated(attrs, TIPC_NLA_BEARER_MAX, |
969 | info->attrs[TIPC_NLA_BEARER], | |
970 | tipc_nl_bearer_policy, info->extack); | |
0655f6a8 RA |
971 | if (err) |
972 | return err; | |
973 | ||
974 | if (!attrs[TIPC_NLA_BEARER_NAME]) | |
975 | return -EINVAL; | |
976 | ||
977 | bearer = nla_data(attrs[TIPC_NLA_BEARER_NAME]); | |
978 | ||
979 | if (attrs[TIPC_NLA_BEARER_DOMAIN]) | |
980 | domain = nla_get_u32(attrs[TIPC_NLA_BEARER_DOMAIN]); | |
981 | ||
982 | if (attrs[TIPC_NLA_BEARER_PROP]) { | |
983 | struct nlattr *props[TIPC_NLA_PROP_MAX + 1]; | |
984 | ||
985 | err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_BEARER_PROP], | |
986 | props); | |
987 | if (err) | |
988 | return err; | |
989 | ||
990 | if (props[TIPC_NLA_PROP_PRIO]) | |
991 | prio = nla_get_u32(props[TIPC_NLA_PROP_PRIO]); | |
992 | } | |
993 | ||
45cf7edf YX |
994 | return tipc_enable_bearer(net, bearer, domain, prio, attrs); |
995 | } | |
996 | ||
997 | int tipc_nl_bearer_enable(struct sk_buff *skb, struct genl_info *info) | |
998 | { | |
999 | int err; | |
1000 | ||
0655f6a8 | 1001 | rtnl_lock(); |
45cf7edf | 1002 | err = __tipc_nl_bearer_enable(skb, info); |
0655f6a8 RA |
1003 | rtnl_unlock(); |
1004 | ||
45cf7edf | 1005 | return err; |
0655f6a8 | 1006 | } |
315c00bc | 1007 | |
ef20cd4d RA |
1008 | int tipc_nl_bearer_add(struct sk_buff *skb, struct genl_info *info) |
1009 | { | |
1010 | int err; | |
1011 | char *name; | |
1012 | struct tipc_bearer *b; | |
1013 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
1014 | struct net *net = sock_net(skb->sk); | |
1015 | ||
1016 | if (!info->attrs[TIPC_NLA_BEARER]) | |
1017 | return -EINVAL; | |
1018 | ||
8cb08174 JB |
1019 | err = nla_parse_nested_deprecated(attrs, TIPC_NLA_BEARER_MAX, |
1020 | info->attrs[TIPC_NLA_BEARER], | |
1021 | tipc_nl_bearer_policy, info->extack); | |
ef20cd4d RA |
1022 | if (err) |
1023 | return err; | |
1024 | ||
1025 | if (!attrs[TIPC_NLA_BEARER_NAME]) | |
1026 | return -EINVAL; | |
1027 | name = nla_data(attrs[TIPC_NLA_BEARER_NAME]); | |
1028 | ||
1029 | rtnl_lock(); | |
1030 | b = tipc_bearer_find(net, name); | |
1031 | if (!b) { | |
1032 | rtnl_unlock(); | |
1033 | return -EINVAL; | |
1034 | } | |
1035 | ||
1036 | #ifdef CONFIG_TIPC_MEDIA_UDP | |
1037 | if (attrs[TIPC_NLA_BEARER_UDP_OPTS]) { | |
1038 | err = tipc_udp_nl_bearer_add(b, | |
1039 | attrs[TIPC_NLA_BEARER_UDP_OPTS]); | |
1040 | if (err) { | |
1041 | rtnl_unlock(); | |
1042 | return err; | |
1043 | } | |
1044 | } | |
1045 | #endif | |
1046 | rtnl_unlock(); | |
1047 | ||
1048 | return 0; | |
1049 | } | |
1050 | ||
93532bb1 | 1051 | int __tipc_nl_bearer_set(struct sk_buff *skb, struct genl_info *info) |
315c00bc | 1052 | { |
315c00bc RA |
1053 | struct tipc_bearer *b; |
1054 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
c3d6fb85 | 1055 | struct net *net = sock_net(skb->sk); |
37c64cf6 JM |
1056 | char *name; |
1057 | int err; | |
315c00bc RA |
1058 | |
1059 | if (!info->attrs[TIPC_NLA_BEARER]) | |
1060 | return -EINVAL; | |
1061 | ||
8cb08174 JB |
1062 | err = nla_parse_nested_deprecated(attrs, TIPC_NLA_BEARER_MAX, |
1063 | info->attrs[TIPC_NLA_BEARER], | |
1064 | tipc_nl_bearer_policy, info->extack); | |
315c00bc RA |
1065 | if (err) |
1066 | return err; | |
1067 | ||
1068 | if (!attrs[TIPC_NLA_BEARER_NAME]) | |
1069 | return -EINVAL; | |
1070 | name = nla_data(attrs[TIPC_NLA_BEARER_NAME]); | |
1071 | ||
7f9f95d9 | 1072 | b = tipc_bearer_find(net, name); |
93532bb1 | 1073 | if (!b) |
315c00bc | 1074 | return -EINVAL; |
315c00bc RA |
1075 | |
1076 | if (attrs[TIPC_NLA_BEARER_PROP]) { | |
1077 | struct nlattr *props[TIPC_NLA_PROP_MAX + 1]; | |
1078 | ||
1079 | err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_BEARER_PROP], | |
1080 | props); | |
93532bb1 | 1081 | if (err) |
315c00bc | 1082 | return err; |
315c00bc | 1083 | |
37c64cf6 | 1084 | if (props[TIPC_NLA_PROP_TOL]) { |
315c00bc | 1085 | b->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]); |
682cd3cf | 1086 | tipc_node_apply_property(net, b, TIPC_NLA_PROP_TOL); |
37c64cf6 | 1087 | } |
315c00bc RA |
1088 | if (props[TIPC_NLA_PROP_PRIO]) |
1089 | b->priority = nla_get_u32(props[TIPC_NLA_PROP_PRIO]); | |
1090 | if (props[TIPC_NLA_PROP_WIN]) | |
1091 | b->window = nla_get_u32(props[TIPC_NLA_PROP_WIN]); | |
682cd3cf GM |
1092 | if (props[TIPC_NLA_PROP_MTU]) { |
1093 | if (b->media->type_id != TIPC_MEDIA_TYPE_UDP) | |
1094 | return -EINVAL; | |
1095 | #ifdef CONFIG_TIPC_MEDIA_UDP | |
1096 | if (tipc_udp_mtu_bad(nla_get_u32 | |
1097 | (props[TIPC_NLA_PROP_MTU]))) | |
1098 | return -EINVAL; | |
1099 | b->mtu = nla_get_u32(props[TIPC_NLA_PROP_MTU]); | |
1100 | tipc_node_apply_property(net, b, TIPC_NLA_PROP_MTU); | |
1101 | #endif | |
1102 | } | |
315c00bc | 1103 | } |
315c00bc RA |
1104 | |
1105 | return 0; | |
1106 | } | |
46f15c67 | 1107 | |
93532bb1 YX |
1108 | int tipc_nl_bearer_set(struct sk_buff *skb, struct genl_info *info) |
1109 | { | |
1110 | int err; | |
1111 | ||
1112 | rtnl_lock(); | |
1113 | err = __tipc_nl_bearer_set(skb, info); | |
1114 | rtnl_unlock(); | |
1115 | ||
1116 | return err; | |
1117 | } | |
1118 | ||
d8182804 | 1119 | static int __tipc_nl_add_media(struct tipc_nl_msg *msg, |
f2f67390 | 1120 | struct tipc_media *media, int nlflags) |
46f15c67 RA |
1121 | { |
1122 | void *hdr; | |
1123 | struct nlattr *attrs; | |
1124 | struct nlattr *prop; | |
1125 | ||
bfb3e5dd | 1126 | hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family, |
f2f67390 | 1127 | nlflags, TIPC_NL_MEDIA_GET); |
46f15c67 RA |
1128 | if (!hdr) |
1129 | return -EMSGSIZE; | |
1130 | ||
ae0be8de | 1131 | attrs = nla_nest_start_noflag(msg->skb, TIPC_NLA_MEDIA); |
46f15c67 RA |
1132 | if (!attrs) |
1133 | goto msg_full; | |
1134 | ||
1135 | if (nla_put_string(msg->skb, TIPC_NLA_MEDIA_NAME, media->name)) | |
1136 | goto attr_msg_full; | |
1137 | ||
ae0be8de | 1138 | prop = nla_nest_start_noflag(msg->skb, TIPC_NLA_MEDIA_PROP); |
46f15c67 RA |
1139 | if (!prop) |
1140 | goto prop_msg_full; | |
1141 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, media->priority)) | |
1142 | goto prop_msg_full; | |
1143 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, media->tolerance)) | |
1144 | goto prop_msg_full; | |
1145 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, media->window)) | |
1146 | goto prop_msg_full; | |
901271e0 GM |
1147 | if (media->type_id == TIPC_MEDIA_TYPE_UDP) |
1148 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_MTU, media->mtu)) | |
1149 | goto prop_msg_full; | |
46f15c67 RA |
1150 | |
1151 | nla_nest_end(msg->skb, prop); | |
1152 | nla_nest_end(msg->skb, attrs); | |
1153 | genlmsg_end(msg->skb, hdr); | |
1154 | ||
1155 | return 0; | |
1156 | ||
1157 | prop_msg_full: | |
1158 | nla_nest_cancel(msg->skb, prop); | |
1159 | attr_msg_full: | |
1160 | nla_nest_cancel(msg->skb, attrs); | |
1161 | msg_full: | |
1162 | genlmsg_cancel(msg->skb, hdr); | |
1163 | ||
1164 | return -EMSGSIZE; | |
1165 | } | |
1166 | ||
1167 | int tipc_nl_media_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
1168 | { | |
1169 | int err; | |
1170 | int i = cb->args[0]; | |
1171 | struct tipc_nl_msg msg; | |
1172 | ||
1173 | if (i == MAX_MEDIA) | |
1174 | return 0; | |
1175 | ||
1176 | msg.skb = skb; | |
1177 | msg.portid = NETLINK_CB(cb->skb).portid; | |
1178 | msg.seq = cb->nlh->nlmsg_seq; | |
1179 | ||
1180 | rtnl_lock(); | |
1181 | for (; media_info_array[i] != NULL; i++) { | |
f2f67390 ND |
1182 | err = __tipc_nl_add_media(&msg, media_info_array[i], |
1183 | NLM_F_MULTI); | |
46f15c67 RA |
1184 | if (err) |
1185 | break; | |
1186 | } | |
1187 | rtnl_unlock(); | |
1188 | ||
1189 | cb->args[0] = i; | |
1190 | return skb->len; | |
1191 | } | |
1192 | ||
1193 | int tipc_nl_media_get(struct sk_buff *skb, struct genl_info *info) | |
1194 | { | |
1195 | int err; | |
1196 | char *name; | |
1197 | struct tipc_nl_msg msg; | |
1198 | struct tipc_media *media; | |
1199 | struct sk_buff *rep; | |
1200 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
1201 | ||
1202 | if (!info->attrs[TIPC_NLA_MEDIA]) | |
1203 | return -EINVAL; | |
1204 | ||
8cb08174 JB |
1205 | err = nla_parse_nested_deprecated(attrs, TIPC_NLA_MEDIA_MAX, |
1206 | info->attrs[TIPC_NLA_MEDIA], | |
1207 | tipc_nl_media_policy, info->extack); | |
46f15c67 RA |
1208 | if (err) |
1209 | return err; | |
1210 | ||
1211 | if (!attrs[TIPC_NLA_MEDIA_NAME]) | |
1212 | return -EINVAL; | |
1213 | name = nla_data(attrs[TIPC_NLA_MEDIA_NAME]); | |
1214 | ||
1215 | rep = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); | |
1216 | if (!rep) | |
1217 | return -ENOMEM; | |
1218 | ||
1219 | msg.skb = rep; | |
1220 | msg.portid = info->snd_portid; | |
1221 | msg.seq = info->snd_seq; | |
1222 | ||
1223 | rtnl_lock(); | |
1224 | media = tipc_media_find(name); | |
1225 | if (!media) { | |
1226 | err = -EINVAL; | |
1227 | goto err_out; | |
1228 | } | |
1229 | ||
f2f67390 | 1230 | err = __tipc_nl_add_media(&msg, media, 0); |
46f15c67 RA |
1231 | if (err) |
1232 | goto err_out; | |
1233 | rtnl_unlock(); | |
1234 | ||
1235 | return genlmsg_reply(rep, info); | |
1236 | err_out: | |
1237 | rtnl_unlock(); | |
1238 | nlmsg_free(rep); | |
1239 | ||
1240 | return err; | |
1241 | } | |
1e55417d | 1242 | |
07ffb223 | 1243 | int __tipc_nl_media_set(struct sk_buff *skb, struct genl_info *info) |
1e55417d RA |
1244 | { |
1245 | int err; | |
1246 | char *name; | |
1247 | struct tipc_media *m; | |
1248 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
1249 | ||
1250 | if (!info->attrs[TIPC_NLA_MEDIA]) | |
1251 | return -EINVAL; | |
1252 | ||
8cb08174 JB |
1253 | err = nla_parse_nested_deprecated(attrs, TIPC_NLA_MEDIA_MAX, |
1254 | info->attrs[TIPC_NLA_MEDIA], | |
1255 | tipc_nl_media_policy, info->extack); | |
1e55417d RA |
1256 | |
1257 | if (!attrs[TIPC_NLA_MEDIA_NAME]) | |
1258 | return -EINVAL; | |
1259 | name = nla_data(attrs[TIPC_NLA_MEDIA_NAME]); | |
1260 | ||
1e55417d | 1261 | m = tipc_media_find(name); |
07ffb223 | 1262 | if (!m) |
1e55417d | 1263 | return -EINVAL; |
1e55417d RA |
1264 | |
1265 | if (attrs[TIPC_NLA_MEDIA_PROP]) { | |
1266 | struct nlattr *props[TIPC_NLA_PROP_MAX + 1]; | |
1267 | ||
1268 | err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_MEDIA_PROP], | |
1269 | props); | |
07ffb223 | 1270 | if (err) |
1e55417d | 1271 | return err; |
1e55417d RA |
1272 | |
1273 | if (props[TIPC_NLA_PROP_TOL]) | |
1274 | m->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]); | |
1275 | if (props[TIPC_NLA_PROP_PRIO]) | |
1276 | m->priority = nla_get_u32(props[TIPC_NLA_PROP_PRIO]); | |
1277 | if (props[TIPC_NLA_PROP_WIN]) | |
1278 | m->window = nla_get_u32(props[TIPC_NLA_PROP_WIN]); | |
901271e0 GM |
1279 | if (props[TIPC_NLA_PROP_MTU]) { |
1280 | if (m->type_id != TIPC_MEDIA_TYPE_UDP) | |
1281 | return -EINVAL; | |
1282 | #ifdef CONFIG_TIPC_MEDIA_UDP | |
1283 | if (tipc_udp_mtu_bad(nla_get_u32 | |
1284 | (props[TIPC_NLA_PROP_MTU]))) | |
1285 | return -EINVAL; | |
1286 | m->mtu = nla_get_u32(props[TIPC_NLA_PROP_MTU]); | |
1287 | #endif | |
1288 | } | |
1e55417d | 1289 | } |
1e55417d RA |
1290 | |
1291 | return 0; | |
1292 | } | |
07ffb223 YX |
1293 | |
1294 | int tipc_nl_media_set(struct sk_buff *skb, struct genl_info *info) | |
1295 | { | |
1296 | int err; | |
1297 | ||
1298 | rtnl_lock(); | |
1299 | err = __tipc_nl_media_set(skb, info); | |
1300 | rtnl_unlock(); | |
1301 | ||
1302 | return err; | |
1303 | } |