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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, |
93c39646 HL |
236 | struct nlattr *attr[], |
237 | struct netlink_ext_ack *extack) | |
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 = ""; |
32b690cc | 248 | u32 i; |
b97bf3fd | 249 | |
f19765f4 | 250 | if (!bearer_name_validate(name, &b_names)) { |
cb30a633 | 251 | errstr = "illegal name"; |
93c39646 | 252 | NL_SET_ERR_MSG(extack, "Illegal name"); |
cb30a633 | 253 | goto rejected; |
a10bd924 | 254 | } |
cb30a633 | 255 | |
cb30a633 JM |
256 | if (prio > TIPC_MAX_LINK_PRI && prio != TIPC_MEDIA_LINK_PRI) { |
257 | errstr = "illegal priority"; | |
93c39646 | 258 | NL_SET_ERR_MSG(extack, "Illegal priority"); |
cb30a633 | 259 | goto rejected; |
a10bd924 | 260 | } |
b97bf3fd | 261 | |
1a90632d JPM |
262 | m = tipc_media_find(b_names.media_name); |
263 | if (!m) { | |
cb30a633 | 264 | errstr = "media not registered"; |
93c39646 | 265 | NL_SET_ERR_MSG(extack, "Media not registered"); |
cb30a633 | 266 | goto rejected; |
b97bf3fd | 267 | } |
16cb4b33 | 268 | |
cb30a633 JM |
269 | if (prio == TIPC_MEDIA_LINK_PRI) |
270 | prio = m->priority; | |
b97bf3fd | 271 | |
cb30a633 | 272 | /* Check new bearer vs existing ones and find free bearer id if any */ |
32b690cc HL |
273 | bearer_id = MAX_BEARERS; |
274 | i = MAX_BEARERS; | |
275 | while (i-- != 0) { | |
276 | b = rtnl_dereference(tn->bearer_list[i]); | |
277 | if (!b) { | |
278 | bearer_id = i; | |
279 | continue; | |
280 | } | |
1a90632d | 281 | if (!strcmp(name, b->name)) { |
cb30a633 | 282 | errstr = "already enabled"; |
93c39646 | 283 | NL_SET_ERR_MSG(extack, "Already enabled"); |
cb30a633 | 284 | goto rejected; |
b97bf3fd | 285 | } |
32b690cc HL |
286 | |
287 | if (b->priority == prio && | |
288 | (++with_this_prio > 2)) { | |
289 | pr_warn("Bearer <%s>: already 2 bearers with priority %u\n", | |
290 | name, prio); | |
291 | ||
292 | if (prio == TIPC_MIN_LINK_PRI) { | |
293 | errstr = "cannot adjust to lower"; | |
294 | NL_SET_ERR_MSG(extack, "Cannot adjust to lower"); | |
295 | goto rejected; | |
296 | } | |
297 | ||
298 | pr_warn("Bearer <%s>: trying with adjusted priority\n", | |
299 | name); | |
300 | prio--; | |
301 | bearer_id = MAX_BEARERS; | |
302 | i = MAX_BEARERS; | |
303 | with_this_prio = 1; | |
b97bf3fd PL |
304 | } |
305 | } | |
cb30a633 | 306 | |
b97bf3fd | 307 | if (bearer_id >= MAX_BEARERS) { |
cb30a633 | 308 | errstr = "max 3 bearers permitted"; |
93c39646 | 309 | NL_SET_ERR_MSG(extack, "Max 3 bearers permitted"); |
cb30a633 | 310 | goto rejected; |
b97bf3fd PL |
311 | } |
312 | ||
1a90632d JPM |
313 | b = kzalloc(sizeof(*b), GFP_ATOMIC); |
314 | if (!b) | |
7216cd94 YX |
315 | return -ENOMEM; |
316 | ||
1a90632d JPM |
317 | strcpy(b->name, name); |
318 | b->media = m; | |
319 | res = m->enable_media(net, b, attr); | |
b97bf3fd | 320 | if (res) { |
19142551 | 321 | kfree(b); |
cb30a633 | 322 | errstr = "failed to enable media"; |
93c39646 | 323 | NL_SET_ERR_MSG(extack, "Failed to enable media"); |
cb30a633 | 324 | goto rejected; |
b97bf3fd PL |
325 | } |
326 | ||
1a90632d JPM |
327 | b->identity = bearer_id; |
328 | b->tolerance = m->tolerance; | |
329 | b->window = m->window; | |
330 | b->domain = disc_domain; | |
331 | b->net_plane = bearer_id + 'A'; | |
cb30a633 | 332 | b->priority = prio; |
0d051bf9 | 333 | test_and_set_bit_lock(0, &b->up); |
3a777ff8 | 334 | |
4e801fa1 | 335 | res = tipc_disc_create(net, b, &b->bcast_addr, &skb); |
3a777ff8 | 336 | if (res) { |
1a90632d | 337 | bearer_disable(net, b); |
cb30a633 | 338 | errstr = "failed to create discoverer"; |
93c39646 | 339 | NL_SET_ERR_MSG(extack, "Failed to create discoverer"); |
cb30a633 | 340 | goto rejected; |
3a777ff8 | 341 | } |
3874ccbb | 342 | |
1a90632d | 343 | rcu_assign_pointer(tn->bearer_list[bearer_id], b); |
4e801fa1 JPM |
344 | if (skb) |
345 | tipc_bearer_xmit_skb(net, bearer_id, skb, &b->bcast_addr); | |
35c55c98 | 346 | |
19142551 TR |
347 | if (tipc_mon_create(net, bearer_id)) { |
348 | bearer_disable(net, b); | |
35c55c98 | 349 | return -ENOMEM; |
19142551 | 350 | } |
35c55c98 | 351 | |
20263641 JM |
352 | pr_info("Enabled bearer <%s>, priority %u\n", name, prio); |
353 | ||
cb30a633 JM |
354 | return res; |
355 | rejected: | |
20263641 | 356 | pr_warn("Enabling of bearer <%s> rejected, %s\n", name, errstr); |
b97bf3fd PL |
357 | return res; |
358 | } | |
359 | ||
360 | /** | |
512137ee | 361 | * tipc_reset_bearer - Reset all links established over this bearer |
b97bf3fd | 362 | */ |
1a90632d | 363 | static int tipc_reset_bearer(struct net *net, struct tipc_bearer *b) |
b97bf3fd | 364 | { |
1a90632d JPM |
365 | pr_info("Resetting bearer <%s>\n", b->name); |
366 | tipc_node_delete_links(net, b->identity); | |
367 | tipc_disc_reset(net, b); | |
0e35fd5e | 368 | return 0; |
b97bf3fd PL |
369 | } |
370 | ||
371 | /** | |
617d3c7a | 372 | * bearer_disable |
c4307285 | 373 | * |
7216cd94 | 374 | * Note: This routine assumes caller holds RTNL lock. |
b97bf3fd | 375 | */ |
1a90632d | 376 | static void bearer_disable(struct net *net, struct tipc_bearer *b) |
b97bf3fd | 377 | { |
5b7066c3 JPM |
378 | struct tipc_net *tn = tipc_net(net); |
379 | int bearer_id = b->identity; | |
3874ccbb | 380 | |
1a90632d | 381 | pr_info("Disabling bearer <%s>\n", b->name); |
0d051bf9 | 382 | clear_bit_unlock(0, &b->up); |
5b7066c3 | 383 | tipc_node_delete_links(net, bearer_id); |
0d051bf9 | 384 | b->media->disable_media(b); |
1a90632d | 385 | RCU_INIT_POINTER(b->media_ptr, NULL); |
b39e465e JM |
386 | if (b->disc) |
387 | tipc_disc_delete(b->disc); | |
5b7066c3 | 388 | RCU_INIT_POINTER(tn->bearer_list[bearer_id], NULL); |
1a90632d | 389 | kfree_rcu(b, rcu); |
35c55c98 | 390 | tipc_mon_delete(net, bearer_id); |
b97bf3fd PL |
391 | } |
392 | ||
d0f91938 EH |
393 | int tipc_enable_l2_media(struct net *net, struct tipc_bearer *b, |
394 | struct nlattr *attr[]) | |
e4d050cb | 395 | { |
52dfae5c JM |
396 | char *dev_name = strchr((const char *)b->name, ':') + 1; |
397 | int hwaddr_len = b->media->hwaddr_len; | |
398 | u8 node_id[NODE_ID_LEN] = {0,}; | |
e4d050cb | 399 | struct net_device *dev; |
e4d050cb YX |
400 | |
401 | /* Find device with specified name */ | |
52dfae5c | 402 | dev = dev_get_by_name(net, dev_name); |
e4d050cb YX |
403 | if (!dev) |
404 | return -ENODEV; | |
3de81b75 MK |
405 | if (tipc_mtu_bad(dev, 0)) { |
406 | dev_put(dev); | |
407 | return -EINVAL; | |
408 | } | |
6c9081a3 JR |
409 | if (dev == net->loopback_dev) { |
410 | dev_put(dev); | |
411 | pr_info("Enabling <%s> not permitted\n", b->name); | |
412 | return -EINVAL; | |
413 | } | |
e4d050cb | 414 | |
52dfae5c JM |
415 | /* Autoconfigure own node identity if needed */ |
416 | if (!tipc_own_id(net) && hwaddr_len <= NODE_ID_LEN) { | |
417 | memcpy(node_id, dev->dev_addr, hwaddr_len); | |
418 | tipc_net_init(net, node_id, 0); | |
419 | } | |
420 | if (!tipc_own_id(net)) { | |
63135ee0 | 421 | dev_put(dev); |
52dfae5c JM |
422 | pr_warn("Failed to obtain node identity\n"); |
423 | return -EINVAL; | |
424 | } | |
425 | ||
38504c28 | 426 | /* Associate TIPC bearer with L2 bearer */ |
2231c5af | 427 | rcu_assign_pointer(b->media_ptr, dev); |
d55c60eb PB |
428 | b->pt.dev = dev; |
429 | b->pt.type = htons(ETH_P_TIPC); | |
430 | b->pt.func = tipc_l2_rcv_msg; | |
431 | dev_add_pack(&b->pt); | |
38504c28 | 432 | memset(&b->bcast_addr, 0, sizeof(b->bcast_addr)); |
52dfae5c | 433 | memcpy(b->bcast_addr.value, dev->broadcast, hwaddr_len); |
e4d050cb | 434 | b->bcast_addr.media_id = b->media->type_id; |
9999974a | 435 | b->bcast_addr.broadcast = TIPC_BROADCAST_SUPPORT; |
e4d050cb | 436 | b->mtu = dev->mtu; |
38504c28 | 437 | b->media->raw2addr(b, &b->addr, (char *)dev->dev_addr); |
e4d050cb YX |
438 | rcu_assign_pointer(dev->tipc_ptr, b); |
439 | return 0; | |
440 | } | |
441 | ||
38504c28 | 442 | /* tipc_disable_l2_media - detach TIPC bearer from an L2 interface |
e4d050cb | 443 | * |
282b3a05 | 444 | * Mark L2 bearer as inactive so that incoming buffers are thrown away |
e4d050cb YX |
445 | */ |
446 | void tipc_disable_l2_media(struct tipc_bearer *b) | |
447 | { | |
2231c5af YX |
448 | struct net_device *dev; |
449 | ||
450 | dev = (struct net_device *)rtnl_dereference(b->media_ptr); | |
d55c60eb | 451 | dev_remove_pack(&b->pt); |
e4d050cb | 452 | RCU_INIT_POINTER(dev->tipc_ptr, NULL); |
f1c8d8cb | 453 | synchronize_net(); |
e4d050cb YX |
454 | dev_put(dev); |
455 | } | |
456 | ||
457 | /** | |
38504c28 | 458 | * tipc_l2_send_msg - send a TIPC packet out over an L2 interface |
5b7066c3 | 459 | * @skb: the packet to be sent |
1a90632d | 460 | * @b: the bearer through which the packet is to be sent |
e4d050cb YX |
461 | * @dest: peer destination address |
462 | */ | |
7214bcf8 | 463 | int tipc_l2_send_msg(struct net *net, struct sk_buff *skb, |
1da46568 | 464 | struct tipc_bearer *b, struct tipc_media_addr *dest) |
e4d050cb | 465 | { |
2231c5af | 466 | struct net_device *dev; |
e4d050cb | 467 | int delta; |
2231c5af | 468 | |
30a4616c | 469 | dev = (struct net_device *)rcu_dereference(b->media_ptr); |
2231c5af YX |
470 | if (!dev) |
471 | return 0; | |
e4d050cb | 472 | |
0d051bf9 JPM |
473 | delta = SKB_DATA_ALIGN(dev->hard_header_len - skb_headroom(skb)); |
474 | if ((delta > 0) && pskb_expand_head(skb, delta, 0, GFP_ATOMIC)) { | |
475 | kfree_skb(skb); | |
476 | return 0; | |
477 | } | |
7214bcf8 JPM |
478 | skb_reset_network_header(skb); |
479 | skb->dev = dev; | |
480 | skb->protocol = htons(ETH_P_TIPC); | |
481 | dev_hard_header(skb, dev, ETH_P_TIPC, dest->value, | |
482 | dev->dev_addr, skb->len); | |
483 | dev_queue_xmit(skb); | |
e4d050cb YX |
484 | return 0; |
485 | } | |
486 | ||
9999974a JPM |
487 | bool tipc_bearer_bcast_support(struct net *net, u32 bearer_id) |
488 | { | |
489 | bool supp = false; | |
490 | struct tipc_bearer *b; | |
491 | ||
492 | rcu_read_lock(); | |
493 | b = bearer_get(net, bearer_id); | |
494 | if (b) | |
495 | supp = (b->bcast_addr.broadcast == TIPC_BROADCAST_SUPPORT); | |
496 | rcu_read_unlock(); | |
497 | return supp; | |
498 | } | |
499 | ||
959e1781 JPM |
500 | int tipc_bearer_mtu(struct net *net, u32 bearer_id) |
501 | { | |
502 | int mtu = 0; | |
503 | struct tipc_bearer *b; | |
504 | ||
505 | rcu_read_lock(); | |
30a4616c | 506 | b = rcu_dereference(tipc_net(net)->bearer_list[bearer_id]); |
959e1781 JPM |
507 | if (b) |
508 | mtu = b->mtu; | |
509 | rcu_read_unlock(); | |
510 | return mtu; | |
511 | } | |
512 | ||
60852d67 JPM |
513 | /* tipc_bearer_xmit_skb - sends buffer to destination over bearer |
514 | */ | |
515 | void tipc_bearer_xmit_skb(struct net *net, u32 bearer_id, | |
516 | struct sk_buff *skb, | |
517 | struct tipc_media_addr *dest) | |
518 | { | |
0d051bf9 | 519 | struct tipc_msg *hdr = buf_msg(skb); |
60852d67 JPM |
520 | struct tipc_bearer *b; |
521 | ||
522 | rcu_read_lock(); | |
0d051bf9 JPM |
523 | b = bearer_get(net, bearer_id); |
524 | if (likely(b && (test_bit(0, &b->up) || msg_is_reset(hdr)))) | |
60852d67 | 525 | b->media->send_msg(net, skb, b, dest); |
4e801fa1 JPM |
526 | else |
527 | kfree_skb(skb); | |
60852d67 | 528 | rcu_read_unlock(); |
60852d67 JPM |
529 | } |
530 | ||
af9b028e JPM |
531 | /* tipc_bearer_xmit() -send buffer to destination over bearer |
532 | */ | |
533 | void tipc_bearer_xmit(struct net *net, u32 bearer_id, | |
534 | struct sk_buff_head *xmitq, | |
535 | struct tipc_media_addr *dst) | |
536 | { | |
af9b028e JPM |
537 | struct tipc_bearer *b; |
538 | struct sk_buff *skb, *tmp; | |
539 | ||
540 | if (skb_queue_empty(xmitq)) | |
541 | return; | |
542 | ||
543 | rcu_read_lock(); | |
0d051bf9 | 544 | b = bearer_get(net, bearer_id); |
4e801fa1 JPM |
545 | if (unlikely(!b)) |
546 | __skb_queue_purge(xmitq); | |
547 | skb_queue_walk_safe(xmitq, skb, tmp) { | |
548 | __skb_dequeue(xmitq); | |
0d051bf9 JPM |
549 | if (likely(test_bit(0, &b->up) || msg_is_reset(buf_msg(skb)))) |
550 | b->media->send_msg(net, skb, b, dst); | |
551 | else | |
5128b185 | 552 | kfree_skb(skb); |
b06b281e JPM |
553 | } |
554 | rcu_read_unlock(); | |
555 | } | |
556 | ||
557 | /* tipc_bearer_bc_xmit() - broadcast buffers to all destinations | |
558 | */ | |
559 | void tipc_bearer_bc_xmit(struct net *net, u32 bearer_id, | |
560 | struct sk_buff_head *xmitq) | |
561 | { | |
562 | struct tipc_net *tn = tipc_net(net); | |
563 | int net_id = tn->net_id; | |
564 | struct tipc_bearer *b; | |
565 | struct sk_buff *skb, *tmp; | |
566 | struct tipc_msg *hdr; | |
567 | ||
568 | rcu_read_lock(); | |
0d051bf9 JPM |
569 | b = bearer_get(net, bearer_id); |
570 | if (unlikely(!b || !test_bit(0, &b->up))) | |
4e801fa1 JPM |
571 | __skb_queue_purge(xmitq); |
572 | skb_queue_walk_safe(xmitq, skb, tmp) { | |
573 | hdr = buf_msg(skb); | |
574 | msg_set_non_seq(hdr, 1); | |
575 | msg_set_mc_netid(hdr, net_id); | |
576 | __skb_dequeue(xmitq); | |
577 | b->media->send_msg(net, skb, b, &b->bcast_addr); | |
af9b028e JPM |
578 | } |
579 | rcu_read_unlock(); | |
580 | } | |
581 | ||
6e967adf YX |
582 | /** |
583 | * tipc_l2_rcv_msg - handle incoming TIPC message from an interface | |
584 | * @buf: the received packet | |
585 | * @dev: the net device that the packet was received on | |
586 | * @pt: the packet_type structure which was used to register this handler | |
587 | * @orig_dev: the original receive net device in case the device is a bond | |
588 | * | |
589 | * Accept only packets explicitly sent to this node, or broadcast packets; | |
590 | * ignores packets sent using interface multicast, and traffic sent to other | |
591 | * nodes (which can happen if interface is running in promiscuous mode). | |
592 | */ | |
4e801fa1 | 593 | static int tipc_l2_rcv_msg(struct sk_buff *skb, struct net_device *dev, |
6e967adf YX |
594 | struct packet_type *pt, struct net_device *orig_dev) |
595 | { | |
1a90632d | 596 | struct tipc_bearer *b; |
6e967adf | 597 | |
6e967adf | 598 | rcu_read_lock(); |
30a4616c XL |
599 | b = rcu_dereference(dev->tipc_ptr) ?: |
600 | rcu_dereference(orig_dev->tipc_ptr); | |
0d051bf9 | 601 | if (likely(b && test_bit(0, &b->up) && |
fed5f571 | 602 | (skb->pkt_type <= PACKET_MULTICAST))) { |
a8305bff | 603 | skb_mark_not_on_list(skb); |
d55c60eb | 604 | tipc_rcv(dev_net(b->pt.dev), skb, b); |
4e801fa1 JPM |
605 | rcu_read_unlock(); |
606 | return NET_RX_SUCCESS; | |
6e967adf YX |
607 | } |
608 | rcu_read_unlock(); | |
4e801fa1 | 609 | kfree_skb(skb); |
6e967adf YX |
610 | return NET_RX_DROP; |
611 | } | |
612 | ||
613 | /** | |
614 | * tipc_l2_device_event - handle device events from network device | |
615 | * @nb: the context of the notification | |
616 | * @evt: the type of event | |
617 | * @ptr: the net device that the event was on | |
618 | * | |
619 | * This function is called by the Ethernet driver in case of link | |
620 | * change event. | |
621 | */ | |
622 | static int tipc_l2_device_event(struct notifier_block *nb, unsigned long evt, | |
623 | void *ptr) | |
624 | { | |
6e967adf | 625 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
c93d3baa | 626 | struct net *net = dev_net(dev); |
1a90632d | 627 | struct tipc_bearer *b; |
6e967adf | 628 | |
1a90632d JPM |
629 | b = rtnl_dereference(dev->tipc_ptr); |
630 | if (!b) | |
6e967adf | 631 | return NOTIFY_DONE; |
6e967adf | 632 | |
cf5f55f7 | 633 | trace_tipc_l2_device_event(dev, b, evt); |
6e967adf YX |
634 | switch (evt) { |
635 | case NETDEV_CHANGE: | |
94b6ddce PB |
636 | if (netif_carrier_ok(dev) && netif_oper_up(dev)) { |
637 | test_and_set_bit_lock(0, &b->up); | |
6e967adf | 638 | break; |
94b6ddce PB |
639 | } |
640 | /* fall through */ | |
282b3a05 | 641 | case NETDEV_GOING_DOWN: |
0d051bf9 | 642 | clear_bit_unlock(0, &b->up); |
5b7066c3 JPM |
643 | tipc_reset_bearer(net, b); |
644 | break; | |
94b6ddce PB |
645 | case NETDEV_UP: |
646 | test_and_set_bit_lock(0, &b->up); | |
647 | break; | |
6e967adf | 648 | case NETDEV_CHANGEMTU: |
3de81b75 MK |
649 | if (tipc_mtu_bad(dev, 0)) { |
650 | bearer_disable(net, b); | |
651 | break; | |
652 | } | |
653 | b->mtu = dev->mtu; | |
1a90632d | 654 | tipc_reset_bearer(net, b); |
a21a584d | 655 | break; |
6e967adf | 656 | case NETDEV_CHANGEADDR: |
1a90632d | 657 | b->media->raw2addr(b, &b->addr, |
5b7066c3 | 658 | (char *)dev->dev_addr); |
1a90632d | 659 | tipc_reset_bearer(net, b); |
6e967adf YX |
660 | break; |
661 | case NETDEV_UNREGISTER: | |
662 | case NETDEV_CHANGENAME: | |
8e0deed9 | 663 | bearer_disable(net, b); |
6e967adf YX |
664 | break; |
665 | } | |
6e967adf YX |
666 | return NOTIFY_OK; |
667 | } | |
668 | ||
6e967adf YX |
669 | static struct notifier_block notifier = { |
670 | .notifier_call = tipc_l2_device_event, | |
671 | .priority = 0, | |
672 | }; | |
673 | ||
674 | int tipc_bearer_setup(void) | |
675 | { | |
d55c60eb | 676 | return register_netdevice_notifier(¬ifier); |
6e967adf YX |
677 | } |
678 | ||
679 | void tipc_bearer_cleanup(void) | |
680 | { | |
681 | unregister_netdevice_notifier(¬ifier); | |
6e967adf | 682 | } |
b97bf3fd | 683 | |
f2f9800d | 684 | void tipc_bearer_stop(struct net *net) |
b97bf3fd | 685 | { |
7f9f95d9 | 686 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
1a90632d | 687 | struct tipc_bearer *b; |
b97bf3fd PL |
688 | u32 i; |
689 | ||
b97bf3fd | 690 | for (i = 0; i < MAX_BEARERS; i++) { |
1a90632d JPM |
691 | b = rtnl_dereference(tn->bearer_list[i]); |
692 | if (b) { | |
693 | bearer_disable(net, b); | |
7f9f95d9 | 694 | tn->bearer_list[i] = NULL; |
3874ccbb | 695 | } |
b97bf3fd | 696 | } |
b97bf3fd | 697 | } |
0655f6a8 | 698 | |
6c9081a3 JR |
699 | void tipc_clone_to_loopback(struct net *net, struct sk_buff_head *pkts) |
700 | { | |
701 | struct net_device *dev = net->loopback_dev; | |
702 | struct sk_buff *skb, *_skb; | |
703 | int exp; | |
704 | ||
705 | skb_queue_walk(pkts, _skb) { | |
706 | skb = pskb_copy(_skb, GFP_ATOMIC); | |
707 | if (!skb) | |
708 | continue; | |
709 | ||
710 | exp = SKB_DATA_ALIGN(dev->hard_header_len - skb_headroom(skb)); | |
711 | if (exp > 0 && pskb_expand_head(skb, exp, 0, GFP_ATOMIC)) { | |
712 | kfree_skb(skb); | |
713 | continue; | |
714 | } | |
715 | ||
716 | skb_reset_network_header(skb); | |
717 | dev_hard_header(skb, dev, ETH_P_TIPC, dev->dev_addr, | |
718 | dev->dev_addr, skb->len); | |
719 | skb->dev = dev; | |
720 | skb->pkt_type = PACKET_HOST; | |
721 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
722 | skb->protocol = eth_type_trans(skb, dev); | |
723 | netif_rx_ni(skb); | |
724 | } | |
725 | } | |
726 | ||
727 | static int tipc_loopback_rcv_pkt(struct sk_buff *skb, struct net_device *dev, | |
728 | struct packet_type *pt, struct net_device *od) | |
729 | { | |
730 | consume_skb(skb); | |
731 | return NET_RX_SUCCESS; | |
732 | } | |
733 | ||
734 | int tipc_attach_loopback(struct net *net) | |
735 | { | |
736 | struct net_device *dev = net->loopback_dev; | |
737 | struct tipc_net *tn = tipc_net(net); | |
738 | ||
739 | if (!dev) | |
740 | return -ENODEV; | |
741 | ||
742 | dev_hold(dev); | |
743 | tn->loopback_pt.dev = dev; | |
744 | tn->loopback_pt.type = htons(ETH_P_TIPC); | |
745 | tn->loopback_pt.func = tipc_loopback_rcv_pkt; | |
746 | dev_add_pack(&tn->loopback_pt); | |
747 | return 0; | |
748 | } | |
749 | ||
750 | void tipc_detach_loopback(struct net *net) | |
751 | { | |
752 | struct tipc_net *tn = tipc_net(net); | |
753 | ||
754 | dev_remove_pack(&tn->loopback_pt); | |
755 | dev_put(net->loopback_dev); | |
756 | } | |
757 | ||
35b9dd76 | 758 | /* Caller should hold rtnl_lock to protect the bearer */ |
d8182804 | 759 | static int __tipc_nl_add_bearer(struct tipc_nl_msg *msg, |
f2f67390 | 760 | struct tipc_bearer *bearer, int nlflags) |
35b9dd76 RA |
761 | { |
762 | void *hdr; | |
763 | struct nlattr *attrs; | |
764 | struct nlattr *prop; | |
765 | ||
bfb3e5dd | 766 | hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family, |
f2f67390 | 767 | nlflags, TIPC_NL_BEARER_GET); |
35b9dd76 RA |
768 | if (!hdr) |
769 | return -EMSGSIZE; | |
770 | ||
ae0be8de | 771 | attrs = nla_nest_start_noflag(msg->skb, TIPC_NLA_BEARER); |
35b9dd76 RA |
772 | if (!attrs) |
773 | goto msg_full; | |
774 | ||
775 | if (nla_put_string(msg->skb, TIPC_NLA_BEARER_NAME, bearer->name)) | |
776 | goto attr_msg_full; | |
777 | ||
ae0be8de | 778 | prop = nla_nest_start_noflag(msg->skb, TIPC_NLA_BEARER_PROP); |
35b9dd76 RA |
779 | if (!prop) |
780 | goto prop_msg_full; | |
781 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, bearer->priority)) | |
782 | goto prop_msg_full; | |
783 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, bearer->tolerance)) | |
784 | goto prop_msg_full; | |
785 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, bearer->window)) | |
786 | goto prop_msg_full; | |
682cd3cf GM |
787 | if (bearer->media->type_id == TIPC_MEDIA_TYPE_UDP) |
788 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_MTU, bearer->mtu)) | |
789 | goto prop_msg_full; | |
35b9dd76 RA |
790 | |
791 | nla_nest_end(msg->skb, prop); | |
fdb3accc RA |
792 | |
793 | #ifdef CONFIG_TIPC_MEDIA_UDP | |
794 | if (bearer->media->type_id == TIPC_MEDIA_TYPE_UDP) { | |
795 | if (tipc_udp_nl_add_bearer_data(msg, bearer)) | |
796 | goto attr_msg_full; | |
797 | } | |
798 | #endif | |
799 | ||
35b9dd76 RA |
800 | nla_nest_end(msg->skb, attrs); |
801 | genlmsg_end(msg->skb, hdr); | |
802 | ||
803 | return 0; | |
804 | ||
805 | prop_msg_full: | |
806 | nla_nest_cancel(msg->skb, prop); | |
807 | attr_msg_full: | |
808 | nla_nest_cancel(msg->skb, attrs); | |
809 | msg_full: | |
810 | genlmsg_cancel(msg->skb, hdr); | |
811 | ||
812 | return -EMSGSIZE; | |
813 | } | |
814 | ||
815 | int tipc_nl_bearer_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
816 | { | |
817 | int err; | |
818 | int i = cb->args[0]; | |
819 | struct tipc_bearer *bearer; | |
820 | struct tipc_nl_msg msg; | |
7f9f95d9 YX |
821 | struct net *net = sock_net(skb->sk); |
822 | struct tipc_net *tn = net_generic(net, tipc_net_id); | |
35b9dd76 RA |
823 | |
824 | if (i == MAX_BEARERS) | |
825 | return 0; | |
826 | ||
827 | msg.skb = skb; | |
828 | msg.portid = NETLINK_CB(cb->skb).portid; | |
829 | msg.seq = cb->nlh->nlmsg_seq; | |
830 | ||
831 | rtnl_lock(); | |
832 | for (i = 0; i < MAX_BEARERS; i++) { | |
7f9f95d9 | 833 | bearer = rtnl_dereference(tn->bearer_list[i]); |
35b9dd76 RA |
834 | if (!bearer) |
835 | continue; | |
836 | ||
f2f67390 | 837 | err = __tipc_nl_add_bearer(&msg, bearer, NLM_F_MULTI); |
35b9dd76 RA |
838 | if (err) |
839 | break; | |
840 | } | |
841 | rtnl_unlock(); | |
842 | ||
843 | cb->args[0] = i; | |
844 | return skb->len; | |
845 | } | |
846 | ||
847 | int tipc_nl_bearer_get(struct sk_buff *skb, struct genl_info *info) | |
848 | { | |
849 | int err; | |
850 | char *name; | |
851 | struct sk_buff *rep; | |
852 | struct tipc_bearer *bearer; | |
853 | struct tipc_nl_msg msg; | |
854 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
7f9f95d9 | 855 | struct net *net = genl_info_net(info); |
35b9dd76 RA |
856 | |
857 | if (!info->attrs[TIPC_NLA_BEARER]) | |
858 | return -EINVAL; | |
859 | ||
8cb08174 JB |
860 | err = nla_parse_nested_deprecated(attrs, TIPC_NLA_BEARER_MAX, |
861 | info->attrs[TIPC_NLA_BEARER], | |
862 | tipc_nl_bearer_policy, info->extack); | |
35b9dd76 RA |
863 | if (err) |
864 | return err; | |
865 | ||
866 | if (!attrs[TIPC_NLA_BEARER_NAME]) | |
867 | return -EINVAL; | |
868 | name = nla_data(attrs[TIPC_NLA_BEARER_NAME]); | |
869 | ||
870 | rep = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); | |
871 | if (!rep) | |
872 | return -ENOMEM; | |
873 | ||
874 | msg.skb = rep; | |
875 | msg.portid = info->snd_portid; | |
876 | msg.seq = info->snd_seq; | |
877 | ||
878 | rtnl_lock(); | |
7f9f95d9 | 879 | bearer = tipc_bearer_find(net, name); |
35b9dd76 RA |
880 | if (!bearer) { |
881 | err = -EINVAL; | |
93c39646 | 882 | NL_SET_ERR_MSG(info->extack, "Bearer not found"); |
35b9dd76 RA |
883 | goto err_out; |
884 | } | |
885 | ||
f2f67390 | 886 | err = __tipc_nl_add_bearer(&msg, bearer, 0); |
35b9dd76 RA |
887 | if (err) |
888 | goto err_out; | |
889 | rtnl_unlock(); | |
890 | ||
891 | return genlmsg_reply(rep, info); | |
892 | err_out: | |
893 | rtnl_unlock(); | |
894 | nlmsg_free(rep); | |
895 | ||
896 | return err; | |
897 | } | |
898 | ||
d59d8b77 | 899 | int __tipc_nl_bearer_disable(struct sk_buff *skb, struct genl_info *info) |
0655f6a8 RA |
900 | { |
901 | int err; | |
902 | char *name; | |
903 | struct tipc_bearer *bearer; | |
904 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
9ab15465 | 905 | struct net *net = sock_net(skb->sk); |
0655f6a8 RA |
906 | |
907 | if (!info->attrs[TIPC_NLA_BEARER]) | |
908 | return -EINVAL; | |
909 | ||
8cb08174 JB |
910 | err = nla_parse_nested_deprecated(attrs, TIPC_NLA_BEARER_MAX, |
911 | info->attrs[TIPC_NLA_BEARER], | |
912 | tipc_nl_bearer_policy, info->extack); | |
0655f6a8 RA |
913 | if (err) |
914 | return err; | |
915 | ||
916 | if (!attrs[TIPC_NLA_BEARER_NAME]) | |
917 | return -EINVAL; | |
918 | ||
919 | name = nla_data(attrs[TIPC_NLA_BEARER_NAME]); | |
920 | ||
7f9f95d9 | 921 | bearer = tipc_bearer_find(net, name); |
93c39646 HL |
922 | if (!bearer) { |
923 | NL_SET_ERR_MSG(info->extack, "Bearer not found"); | |
0655f6a8 | 924 | return -EINVAL; |
93c39646 | 925 | } |
0655f6a8 | 926 | |
b1c29f6b | 927 | bearer_disable(net, bearer); |
0655f6a8 RA |
928 | |
929 | return 0; | |
930 | } | |
931 | ||
d59d8b77 YX |
932 | int tipc_nl_bearer_disable(struct sk_buff *skb, struct genl_info *info) |
933 | { | |
934 | int err; | |
935 | ||
936 | rtnl_lock(); | |
937 | err = __tipc_nl_bearer_disable(skb, info); | |
938 | rtnl_unlock(); | |
939 | ||
940 | return err; | |
941 | } | |
942 | ||
45cf7edf | 943 | int __tipc_nl_bearer_enable(struct sk_buff *skb, struct genl_info *info) |
0655f6a8 RA |
944 | { |
945 | int err; | |
946 | char *bearer; | |
947 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
9ab15465 | 948 | struct net *net = sock_net(skb->sk); |
20263641 | 949 | u32 domain = 0; |
0655f6a8 RA |
950 | u32 prio; |
951 | ||
952 | prio = TIPC_MEDIA_LINK_PRI; | |
0655f6a8 RA |
953 | |
954 | if (!info->attrs[TIPC_NLA_BEARER]) | |
955 | return -EINVAL; | |
956 | ||
8cb08174 JB |
957 | err = nla_parse_nested_deprecated(attrs, TIPC_NLA_BEARER_MAX, |
958 | info->attrs[TIPC_NLA_BEARER], | |
959 | tipc_nl_bearer_policy, info->extack); | |
0655f6a8 RA |
960 | if (err) |
961 | return err; | |
962 | ||
963 | if (!attrs[TIPC_NLA_BEARER_NAME]) | |
964 | return -EINVAL; | |
965 | ||
966 | bearer = nla_data(attrs[TIPC_NLA_BEARER_NAME]); | |
967 | ||
968 | if (attrs[TIPC_NLA_BEARER_DOMAIN]) | |
969 | domain = nla_get_u32(attrs[TIPC_NLA_BEARER_DOMAIN]); | |
970 | ||
971 | if (attrs[TIPC_NLA_BEARER_PROP]) { | |
972 | struct nlattr *props[TIPC_NLA_PROP_MAX + 1]; | |
973 | ||
974 | err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_BEARER_PROP], | |
975 | props); | |
976 | if (err) | |
977 | return err; | |
978 | ||
979 | if (props[TIPC_NLA_PROP_PRIO]) | |
980 | prio = nla_get_u32(props[TIPC_NLA_PROP_PRIO]); | |
981 | } | |
982 | ||
93c39646 HL |
983 | return tipc_enable_bearer(net, bearer, domain, prio, attrs, |
984 | info->extack); | |
45cf7edf YX |
985 | } |
986 | ||
987 | int tipc_nl_bearer_enable(struct sk_buff *skb, struct genl_info *info) | |
988 | { | |
989 | int err; | |
990 | ||
0655f6a8 | 991 | rtnl_lock(); |
45cf7edf | 992 | err = __tipc_nl_bearer_enable(skb, info); |
0655f6a8 RA |
993 | rtnl_unlock(); |
994 | ||
45cf7edf | 995 | return err; |
0655f6a8 | 996 | } |
315c00bc | 997 | |
ef20cd4d RA |
998 | int tipc_nl_bearer_add(struct sk_buff *skb, struct genl_info *info) |
999 | { | |
1000 | int err; | |
1001 | char *name; | |
1002 | struct tipc_bearer *b; | |
1003 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
1004 | struct net *net = sock_net(skb->sk); | |
1005 | ||
1006 | if (!info->attrs[TIPC_NLA_BEARER]) | |
1007 | return -EINVAL; | |
1008 | ||
8cb08174 JB |
1009 | err = nla_parse_nested_deprecated(attrs, TIPC_NLA_BEARER_MAX, |
1010 | info->attrs[TIPC_NLA_BEARER], | |
1011 | tipc_nl_bearer_policy, info->extack); | |
ef20cd4d RA |
1012 | if (err) |
1013 | return err; | |
1014 | ||
1015 | if (!attrs[TIPC_NLA_BEARER_NAME]) | |
1016 | return -EINVAL; | |
1017 | name = nla_data(attrs[TIPC_NLA_BEARER_NAME]); | |
1018 | ||
1019 | rtnl_lock(); | |
1020 | b = tipc_bearer_find(net, name); | |
1021 | if (!b) { | |
1022 | rtnl_unlock(); | |
93c39646 | 1023 | NL_SET_ERR_MSG(info->extack, "Bearer not found"); |
ef20cd4d RA |
1024 | return -EINVAL; |
1025 | } | |
1026 | ||
1027 | #ifdef CONFIG_TIPC_MEDIA_UDP | |
1028 | if (attrs[TIPC_NLA_BEARER_UDP_OPTS]) { | |
1029 | err = tipc_udp_nl_bearer_add(b, | |
1030 | attrs[TIPC_NLA_BEARER_UDP_OPTS]); | |
1031 | if (err) { | |
1032 | rtnl_unlock(); | |
1033 | return err; | |
1034 | } | |
1035 | } | |
1036 | #endif | |
1037 | rtnl_unlock(); | |
1038 | ||
1039 | return 0; | |
1040 | } | |
1041 | ||
93532bb1 | 1042 | int __tipc_nl_bearer_set(struct sk_buff *skb, struct genl_info *info) |
315c00bc | 1043 | { |
315c00bc RA |
1044 | struct tipc_bearer *b; |
1045 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
c3d6fb85 | 1046 | struct net *net = sock_net(skb->sk); |
37c64cf6 JM |
1047 | char *name; |
1048 | int err; | |
315c00bc RA |
1049 | |
1050 | if (!info->attrs[TIPC_NLA_BEARER]) | |
1051 | return -EINVAL; | |
1052 | ||
8cb08174 JB |
1053 | err = nla_parse_nested_deprecated(attrs, TIPC_NLA_BEARER_MAX, |
1054 | info->attrs[TIPC_NLA_BEARER], | |
1055 | tipc_nl_bearer_policy, info->extack); | |
315c00bc RA |
1056 | if (err) |
1057 | return err; | |
1058 | ||
1059 | if (!attrs[TIPC_NLA_BEARER_NAME]) | |
1060 | return -EINVAL; | |
1061 | name = nla_data(attrs[TIPC_NLA_BEARER_NAME]); | |
1062 | ||
7f9f95d9 | 1063 | b = tipc_bearer_find(net, name); |
93c39646 HL |
1064 | if (!b) { |
1065 | NL_SET_ERR_MSG(info->extack, "Bearer not found"); | |
315c00bc | 1066 | return -EINVAL; |
93c39646 | 1067 | } |
315c00bc RA |
1068 | |
1069 | if (attrs[TIPC_NLA_BEARER_PROP]) { | |
1070 | struct nlattr *props[TIPC_NLA_PROP_MAX + 1]; | |
1071 | ||
1072 | err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_BEARER_PROP], | |
1073 | props); | |
93532bb1 | 1074 | if (err) |
315c00bc | 1075 | return err; |
315c00bc | 1076 | |
37c64cf6 | 1077 | if (props[TIPC_NLA_PROP_TOL]) { |
315c00bc | 1078 | b->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]); |
682cd3cf | 1079 | tipc_node_apply_property(net, b, TIPC_NLA_PROP_TOL); |
37c64cf6 | 1080 | } |
315c00bc RA |
1081 | if (props[TIPC_NLA_PROP_PRIO]) |
1082 | b->priority = nla_get_u32(props[TIPC_NLA_PROP_PRIO]); | |
1083 | if (props[TIPC_NLA_PROP_WIN]) | |
1084 | b->window = nla_get_u32(props[TIPC_NLA_PROP_WIN]); | |
682cd3cf | 1085 | if (props[TIPC_NLA_PROP_MTU]) { |
93c39646 HL |
1086 | if (b->media->type_id != TIPC_MEDIA_TYPE_UDP) { |
1087 | NL_SET_ERR_MSG(info->extack, | |
1088 | "MTU property is unsupported"); | |
682cd3cf | 1089 | return -EINVAL; |
93c39646 | 1090 | } |
682cd3cf GM |
1091 | #ifdef CONFIG_TIPC_MEDIA_UDP |
1092 | if (tipc_udp_mtu_bad(nla_get_u32 | |
93c39646 HL |
1093 | (props[TIPC_NLA_PROP_MTU]))) { |
1094 | NL_SET_ERR_MSG(info->extack, | |
1095 | "MTU value is out-of-range"); | |
682cd3cf | 1096 | return -EINVAL; |
93c39646 | 1097 | } |
682cd3cf GM |
1098 | b->mtu = nla_get_u32(props[TIPC_NLA_PROP_MTU]); |
1099 | tipc_node_apply_property(net, b, TIPC_NLA_PROP_MTU); | |
1100 | #endif | |
1101 | } | |
315c00bc | 1102 | } |
315c00bc RA |
1103 | |
1104 | return 0; | |
1105 | } | |
46f15c67 | 1106 | |
93532bb1 YX |
1107 | int tipc_nl_bearer_set(struct sk_buff *skb, struct genl_info *info) |
1108 | { | |
1109 | int err; | |
1110 | ||
1111 | rtnl_lock(); | |
1112 | err = __tipc_nl_bearer_set(skb, info); | |
1113 | rtnl_unlock(); | |
1114 | ||
1115 | return err; | |
1116 | } | |
1117 | ||
d8182804 | 1118 | static int __tipc_nl_add_media(struct tipc_nl_msg *msg, |
f2f67390 | 1119 | struct tipc_media *media, int nlflags) |
46f15c67 RA |
1120 | { |
1121 | void *hdr; | |
1122 | struct nlattr *attrs; | |
1123 | struct nlattr *prop; | |
1124 | ||
bfb3e5dd | 1125 | hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family, |
f2f67390 | 1126 | nlflags, TIPC_NL_MEDIA_GET); |
46f15c67 RA |
1127 | if (!hdr) |
1128 | return -EMSGSIZE; | |
1129 | ||
ae0be8de | 1130 | attrs = nla_nest_start_noflag(msg->skb, TIPC_NLA_MEDIA); |
46f15c67 RA |
1131 | if (!attrs) |
1132 | goto msg_full; | |
1133 | ||
1134 | if (nla_put_string(msg->skb, TIPC_NLA_MEDIA_NAME, media->name)) | |
1135 | goto attr_msg_full; | |
1136 | ||
ae0be8de | 1137 | prop = nla_nest_start_noflag(msg->skb, TIPC_NLA_MEDIA_PROP); |
46f15c67 RA |
1138 | if (!prop) |
1139 | goto prop_msg_full; | |
1140 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, media->priority)) | |
1141 | goto prop_msg_full; | |
1142 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, media->tolerance)) | |
1143 | goto prop_msg_full; | |
1144 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, media->window)) | |
1145 | goto prop_msg_full; | |
901271e0 GM |
1146 | if (media->type_id == TIPC_MEDIA_TYPE_UDP) |
1147 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_MTU, media->mtu)) | |
1148 | goto prop_msg_full; | |
46f15c67 RA |
1149 | |
1150 | nla_nest_end(msg->skb, prop); | |
1151 | nla_nest_end(msg->skb, attrs); | |
1152 | genlmsg_end(msg->skb, hdr); | |
1153 | ||
1154 | return 0; | |
1155 | ||
1156 | prop_msg_full: | |
1157 | nla_nest_cancel(msg->skb, prop); | |
1158 | attr_msg_full: | |
1159 | nla_nest_cancel(msg->skb, attrs); | |
1160 | msg_full: | |
1161 | genlmsg_cancel(msg->skb, hdr); | |
1162 | ||
1163 | return -EMSGSIZE; | |
1164 | } | |
1165 | ||
1166 | int tipc_nl_media_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
1167 | { | |
1168 | int err; | |
1169 | int i = cb->args[0]; | |
1170 | struct tipc_nl_msg msg; | |
1171 | ||
1172 | if (i == MAX_MEDIA) | |
1173 | return 0; | |
1174 | ||
1175 | msg.skb = skb; | |
1176 | msg.portid = NETLINK_CB(cb->skb).portid; | |
1177 | msg.seq = cb->nlh->nlmsg_seq; | |
1178 | ||
1179 | rtnl_lock(); | |
1180 | for (; media_info_array[i] != NULL; i++) { | |
f2f67390 ND |
1181 | err = __tipc_nl_add_media(&msg, media_info_array[i], |
1182 | NLM_F_MULTI); | |
46f15c67 RA |
1183 | if (err) |
1184 | break; | |
1185 | } | |
1186 | rtnl_unlock(); | |
1187 | ||
1188 | cb->args[0] = i; | |
1189 | return skb->len; | |
1190 | } | |
1191 | ||
1192 | int tipc_nl_media_get(struct sk_buff *skb, struct genl_info *info) | |
1193 | { | |
1194 | int err; | |
1195 | char *name; | |
1196 | struct tipc_nl_msg msg; | |
1197 | struct tipc_media *media; | |
1198 | struct sk_buff *rep; | |
1199 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
1200 | ||
1201 | if (!info->attrs[TIPC_NLA_MEDIA]) | |
1202 | return -EINVAL; | |
1203 | ||
8cb08174 JB |
1204 | err = nla_parse_nested_deprecated(attrs, TIPC_NLA_MEDIA_MAX, |
1205 | info->attrs[TIPC_NLA_MEDIA], | |
1206 | tipc_nl_media_policy, info->extack); | |
46f15c67 RA |
1207 | if (err) |
1208 | return err; | |
1209 | ||
1210 | if (!attrs[TIPC_NLA_MEDIA_NAME]) | |
1211 | return -EINVAL; | |
1212 | name = nla_data(attrs[TIPC_NLA_MEDIA_NAME]); | |
1213 | ||
1214 | rep = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); | |
1215 | if (!rep) | |
1216 | return -ENOMEM; | |
1217 | ||
1218 | msg.skb = rep; | |
1219 | msg.portid = info->snd_portid; | |
1220 | msg.seq = info->snd_seq; | |
1221 | ||
1222 | rtnl_lock(); | |
1223 | media = tipc_media_find(name); | |
1224 | if (!media) { | |
93c39646 | 1225 | NL_SET_ERR_MSG(info->extack, "Media not found"); |
46f15c67 RA |
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); |
93c39646 HL |
1262 | if (!m) { |
1263 | NL_SET_ERR_MSG(info->extack, "Media not found"); | |
1e55417d | 1264 | return -EINVAL; |
93c39646 | 1265 | } |
1e55417d RA |
1266 | if (attrs[TIPC_NLA_MEDIA_PROP]) { |
1267 | struct nlattr *props[TIPC_NLA_PROP_MAX + 1]; | |
1268 | ||
1269 | err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_MEDIA_PROP], | |
1270 | props); | |
07ffb223 | 1271 | if (err) |
1e55417d | 1272 | return err; |
1e55417d RA |
1273 | |
1274 | if (props[TIPC_NLA_PROP_TOL]) | |
1275 | m->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]); | |
1276 | if (props[TIPC_NLA_PROP_PRIO]) | |
1277 | m->priority = nla_get_u32(props[TIPC_NLA_PROP_PRIO]); | |
1278 | if (props[TIPC_NLA_PROP_WIN]) | |
1279 | m->window = nla_get_u32(props[TIPC_NLA_PROP_WIN]); | |
901271e0 | 1280 | if (props[TIPC_NLA_PROP_MTU]) { |
93c39646 HL |
1281 | if (m->type_id != TIPC_MEDIA_TYPE_UDP) { |
1282 | NL_SET_ERR_MSG(info->extack, | |
1283 | "MTU property is unsupported"); | |
901271e0 | 1284 | return -EINVAL; |
93c39646 | 1285 | } |
901271e0 GM |
1286 | #ifdef CONFIG_TIPC_MEDIA_UDP |
1287 | if (tipc_udp_mtu_bad(nla_get_u32 | |
93c39646 HL |
1288 | (props[TIPC_NLA_PROP_MTU]))) { |
1289 | NL_SET_ERR_MSG(info->extack, | |
1290 | "MTU value is out-of-range"); | |
901271e0 | 1291 | return -EINVAL; |
93c39646 | 1292 | } |
901271e0 GM |
1293 | m->mtu = nla_get_u32(props[TIPC_NLA_PROP_MTU]); |
1294 | #endif | |
1295 | } | |
1e55417d | 1296 | } |
1e55417d RA |
1297 | |
1298 | return 0; | |
1299 | } | |
07ffb223 YX |
1300 | |
1301 | int tipc_nl_media_set(struct sk_buff *skb, struct genl_info *info) | |
1302 | { | |
1303 | int err; | |
1304 | ||
1305 | rtnl_lock(); | |
1306 | err = __tipc_nl_media_set(skb, info); | |
1307 | rtnl_unlock(); | |
1308 | ||
1309 | return err; | |
1310 | } |