Commit | Line | Data |
---|---|---|
b97bf3fd PL |
1 | /* |
2 | * net/tipc/bearer.c: TIPC bearer code | |
c4307285 | 3 | * |
35c55c98 | 4 | * Copyright (c) 1996-2006, 2013-2016, Ericsson AB |
e4d050cb | 5 | * Copyright (c) 2004-2006, 2010-2013, Wind River Systems |
b97bf3fd PL |
6 | * All rights reserved. |
7 | * | |
9ea1fd3c | 8 | * Redistribution and use in source and binary forms, with or without |
b97bf3fd PL |
9 | * modification, are permitted provided that the following conditions are met: |
10 | * | |
9ea1fd3c PL |
11 | * 1. Redistributions of source code must retain the above copyright |
12 | * notice, this list of conditions and the following disclaimer. | |
13 | * 2. Redistributions in binary form must reproduce the above copyright | |
14 | * notice, this list of conditions and the following disclaimer in the | |
15 | * documentation and/or other materials provided with the distribution. | |
16 | * 3. Neither the names of the copyright holders nor the names of its | |
17 | * contributors may be used to endorse or promote products derived from | |
18 | * this software without specific prior written permission. | |
b97bf3fd | 19 | * |
9ea1fd3c PL |
20 | * Alternatively, this software may be distributed under the terms of the |
21 | * GNU General Public License ("GPL") version 2 as published by the Free | |
22 | * Software Foundation. | |
23 | * | |
24 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" | |
25 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
26 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
27 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE | |
28 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
29 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
30 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | |
31 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | |
32 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
33 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
b97bf3fd PL |
34 | * POSSIBILITY OF SUCH DAMAGE. |
35 | */ | |
36 | ||
7f9f95d9 | 37 | #include <net/sock.h> |
b97bf3fd | 38 | #include "core.h" |
b97bf3fd | 39 | #include "bearer.h" |
0655f6a8 | 40 | #include "link.h" |
b97bf3fd | 41 | #include "discover.h" |
35c55c98 | 42 | #include "monitor.h" |
1da46568 | 43 | #include "bcast.h" |
49cc66ea | 44 | #include "netlink.h" |
b97bf3fd | 45 | |
a29a194a | 46 | #define MAX_ADDR_STR 60 |
b97bf3fd | 47 | |
ef72a7e0 | 48 | static struct tipc_media * const media_info_array[] = { |
5702dbab JPM |
49 | ð_media_info, |
50 | #ifdef CONFIG_TIPC_MEDIA_IB | |
51 | &ib_media_info, | |
d0f91938 EH |
52 | #endif |
53 | #ifdef CONFIG_TIPC_MEDIA_UDP | |
54 | &udp_media_info, | |
5702dbab JPM |
55 | #endif |
56 | NULL | |
57 | }; | |
b97bf3fd | 58 | |
1a90632d | 59 | static void bearer_disable(struct net *net, struct tipc_bearer *b); |
3a777ff8 | 60 | |
b97bf3fd | 61 | /** |
5c216e1d | 62 | * tipc_media_find - locates specified media object by name |
b97bf3fd | 63 | */ |
358a0d1c | 64 | struct tipc_media *tipc_media_find(const char *name) |
b97bf3fd | 65 | { |
b97bf3fd PL |
66 | u32 i; |
67 | ||
ef72a7e0 JPM |
68 | for (i = 0; media_info_array[i] != NULL; i++) { |
69 | if (!strcmp(media_info_array[i]->name, name)) | |
5702dbab | 70 | break; |
b97bf3fd | 71 | } |
ef72a7e0 | 72 | return media_info_array[i]; |
b97bf3fd PL |
73 | } |
74 | ||
c79be454 AS |
75 | /** |
76 | * media_find_id - locates specified media object by type identifier | |
77 | */ | |
358a0d1c | 78 | static struct tipc_media *media_find_id(u8 type) |
c79be454 AS |
79 | { |
80 | u32 i; | |
81 | ||
ef72a7e0 JPM |
82 | for (i = 0; media_info_array[i] != NULL; i++) { |
83 | if (media_info_array[i]->type_id == type) | |
5702dbab | 84 | break; |
c79be454 | 85 | } |
ef72a7e0 | 86 | return media_info_array[i]; |
b97bf3fd PL |
87 | } |
88 | ||
89 | /** | |
4323add6 | 90 | * tipc_media_addr_printf - record media address in print buffer |
b97bf3fd | 91 | */ |
dc1aed37 | 92 | void tipc_media_addr_printf(char *buf, int len, struct tipc_media_addr *a) |
b97bf3fd | 93 | { |
c61b666e | 94 | char addr_str[MAX_ADDR_STR]; |
1a90632d | 95 | struct tipc_media *m; |
dc1aed37 | 96 | int ret; |
b97bf3fd | 97 | |
1a90632d | 98 | m = media_find_id(a->media_id); |
b97bf3fd | 99 | |
1a90632d JPM |
100 | if (m && !m->addr2str(a, addr_str, sizeof(addr_str))) |
101 | ret = scnprintf(buf, len, "%s(%s)", m->name, addr_str); | |
c61b666e | 102 | else { |
c61b666e | 103 | u32 i; |
b97bf3fd | 104 | |
941787b8 | 105 | ret = scnprintf(buf, len, "UNKNOWN(%u)", a->media_id); |
3d749a6a | 106 | for (i = 0; i < sizeof(a->value); i++) |
941787b8 | 107 | ret += scnprintf(buf - ret, len + ret, |
dc1aed37 | 108 | "-%02x", a->value[i]); |
b97bf3fd PL |
109 | } |
110 | } | |
111 | ||
b97bf3fd PL |
112 | /** |
113 | * bearer_name_validate - validate & (optionally) deconstruct bearer name | |
2c53040f BH |
114 | * @name: ptr to bearer name string |
115 | * @name_parts: ptr to area for bearer name components (or NULL if not needed) | |
c4307285 | 116 | * |
b97bf3fd PL |
117 | * Returns 1 if bearer name is valid, otherwise 0. |
118 | */ | |
c4307285 | 119 | static int bearer_name_validate(const char *name, |
f19765f4 | 120 | struct tipc_bearer_names *name_parts) |
b97bf3fd PL |
121 | { |
122 | char name_copy[TIPC_MAX_BEARER_NAME]; | |
123 | char *media_name; | |
124 | char *if_name; | |
125 | u32 media_len; | |
126 | u32 if_len; | |
127 | ||
128 | /* copy bearer name & ensure length is OK */ | |
b97bf3fd PL |
129 | name_copy[TIPC_MAX_BEARER_NAME - 1] = 0; |
130 | /* need above in case non-Posix strncpy() doesn't pad with nulls */ | |
131 | strncpy(name_copy, name, TIPC_MAX_BEARER_NAME); | |
132 | if (name_copy[TIPC_MAX_BEARER_NAME - 1] != 0) | |
133 | return 0; | |
134 | ||
135 | /* ensure all component parts of bearer name are present */ | |
b97bf3fd | 136 | media_name = name_copy; |
2db9983a AS |
137 | if_name = strchr(media_name, ':'); |
138 | if (if_name == NULL) | |
b97bf3fd PL |
139 | return 0; |
140 | *(if_name++) = 0; | |
141 | media_len = if_name - media_name; | |
142 | if_len = strlen(if_name) + 1; | |
143 | ||
144 | /* validate component parts of bearer name */ | |
c4307285 | 145 | if ((media_len <= 1) || (media_len > TIPC_MAX_MEDIA_NAME) || |
fc073938 | 146 | (if_len <= 1) || (if_len > TIPC_MAX_IF_NAME)) |
b97bf3fd PL |
147 | return 0; |
148 | ||
149 | /* return bearer name components, if necessary */ | |
b97bf3fd PL |
150 | if (name_parts) { |
151 | strcpy(name_parts->media_name, media_name); | |
152 | strcpy(name_parts->if_name, if_name); | |
153 | } | |
154 | return 1; | |
155 | } | |
156 | ||
157 | /** | |
5c216e1d | 158 | * tipc_bearer_find - locates bearer object with matching bearer name |
b97bf3fd | 159 | */ |
7f9f95d9 | 160 | struct tipc_bearer *tipc_bearer_find(struct net *net, const char *name) |
b97bf3fd | 161 | { |
7f9f95d9 | 162 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
1a90632d | 163 | struct tipc_bearer *b; |
b97bf3fd PL |
164 | u32 i; |
165 | ||
3874ccbb | 166 | for (i = 0; i < MAX_BEARERS; i++) { |
1a90632d JPM |
167 | b = rtnl_dereference(tn->bearer_list[i]); |
168 | if (b && (!strcmp(b->name, name))) | |
169 | return b; | |
b97bf3fd | 170 | } |
1fc54d8f | 171 | return NULL; |
b97bf3fd PL |
172 | } |
173 | ||
ff0d3e78 PB |
174 | /* tipc_bearer_get_name - get the bearer name from its id. |
175 | * @net: network namespace | |
176 | * @name: a pointer to the buffer where the name will be stored. | |
177 | * @bearer_id: the id to get the name from. | |
178 | */ | |
179 | int tipc_bearer_get_name(struct net *net, char *name, u32 bearer_id) | |
180 | { | |
181 | struct tipc_net *tn = tipc_net(net); | |
182 | struct tipc_bearer *b; | |
183 | ||
184 | if (bearer_id >= MAX_BEARERS) | |
185 | return -EINVAL; | |
186 | ||
187 | b = rtnl_dereference(tn->bearer_list[bearer_id]); | |
188 | if (!b) | |
189 | return -EINVAL; | |
190 | ||
191 | strcpy(name, b->name); | |
192 | return 0; | |
193 | } | |
194 | ||
7f9f95d9 | 195 | void tipc_bearer_add_dest(struct net *net, u32 bearer_id, u32 dest) |
b97bf3fd | 196 | { |
7f9f95d9 | 197 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
1a90632d | 198 | struct tipc_bearer *b; |
7a2f7d18 YX |
199 | |
200 | rcu_read_lock(); | |
1a90632d JPM |
201 | b = rcu_dereference_rtnl(tn->bearer_list[bearer_id]); |
202 | if (b) | |
203 | tipc_disc_add_dest(b->link_req); | |
7a2f7d18 | 204 | rcu_read_unlock(); |
b97bf3fd PL |
205 | } |
206 | ||
7f9f95d9 | 207 | void tipc_bearer_remove_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(); | |
1a90632d JPM |
213 | b = rcu_dereference_rtnl(tn->bearer_list[bearer_id]); |
214 | if (b) | |
215 | tipc_disc_remove_dest(b->link_req); | |
7a2f7d18 | 216 | rcu_read_unlock(); |
b97bf3fd PL |
217 | } |
218 | ||
b97bf3fd PL |
219 | /** |
220 | * tipc_enable_bearer - enable bearer with the given name | |
c4307285 | 221 | */ |
9ab15465 | 222 | static int tipc_enable_bearer(struct net *net, const char *name, |
d0f91938 EH |
223 | u32 disc_domain, u32 priority, |
224 | struct nlattr *attr[]) | |
b97bf3fd | 225 | { |
7f9f95d9 | 226 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
1a90632d JPM |
227 | struct tipc_bearer *b; |
228 | struct tipc_media *m; | |
f19765f4 | 229 | struct tipc_bearer_names b_names; |
4e801fa1 | 230 | struct sk_buff *skb; |
b97bf3fd PL |
231 | char addr_string[16]; |
232 | u32 bearer_id; | |
233 | u32 with_this_prio; | |
234 | u32 i; | |
235 | int res = -EINVAL; | |
236 | ||
34747539 | 237 | if (!tn->own_addr) { |
2cf8aa19 EH |
238 | pr_warn("Bearer <%s> rejected, not supported in standalone mode\n", |
239 | name); | |
b97bf3fd | 240 | return -ENOPROTOOPT; |
a10bd924 | 241 | } |
f19765f4 | 242 | if (!bearer_name_validate(name, &b_names)) { |
2cf8aa19 | 243 | pr_warn("Bearer <%s> rejected, illegal name\n", name); |
16cb4b33 | 244 | return -EINVAL; |
a10bd924 | 245 | } |
66e019a6 | 246 | if (tipc_addr_domain_valid(disc_domain) && |
34747539 YX |
247 | (disc_domain != tn->own_addr)) { |
248 | if (tipc_in_scope(disc_domain, tn->own_addr)) { | |
9ff26e9f | 249 | disc_domain = tn->own_addr & TIPC_ZONE_CLUSTER_MASK; |
66e019a6 | 250 | res = 0; /* accept any node in own cluster */ |
34747539 | 251 | } else if (in_own_cluster_exact(net, disc_domain)) |
66e019a6 AS |
252 | res = 0; /* accept specified node in own cluster */ |
253 | } | |
254 | if (res) { | |
2cf8aa19 EH |
255 | pr_warn("Bearer <%s> rejected, illegal discovery domain\n", |
256 | name); | |
a10bd924 AS |
257 | return -EINVAL; |
258 | } | |
9efde4a0 | 259 | if ((priority > TIPC_MAX_LINK_PRI) && |
a10bd924 | 260 | (priority != TIPC_MEDIA_LINK_PRI)) { |
2cf8aa19 | 261 | pr_warn("Bearer <%s> rejected, illegal priority\n", name); |
b97bf3fd | 262 | return -EINVAL; |
a10bd924 | 263 | } |
b97bf3fd | 264 | |
1a90632d JPM |
265 | m = tipc_media_find(b_names.media_name); |
266 | if (!m) { | |
2cf8aa19 EH |
267 | pr_warn("Bearer <%s> rejected, media <%s> not registered\n", |
268 | name, b_names.media_name); | |
7216cd94 | 269 | return -EINVAL; |
b97bf3fd | 270 | } |
16cb4b33 PL |
271 | |
272 | if (priority == TIPC_MEDIA_LINK_PRI) | |
1a90632d | 273 | priority = m->priority; |
b97bf3fd PL |
274 | |
275 | restart: | |
276 | bearer_id = MAX_BEARERS; | |
277 | with_this_prio = 1; | |
278 | for (i = MAX_BEARERS; i-- != 0; ) { | |
1a90632d JPM |
279 | b = rtnl_dereference(tn->bearer_list[i]); |
280 | if (!b) { | |
b97bf3fd PL |
281 | bearer_id = i; |
282 | continue; | |
283 | } | |
1a90632d | 284 | if (!strcmp(name, b->name)) { |
2cf8aa19 EH |
285 | pr_warn("Bearer <%s> rejected, already enabled\n", |
286 | name); | |
7216cd94 | 287 | return -EINVAL; |
b97bf3fd | 288 | } |
1a90632d | 289 | if ((b->priority == priority) && |
b97bf3fd PL |
290 | (++with_this_prio > 2)) { |
291 | if (priority-- == 0) { | |
2cf8aa19 EH |
292 | pr_warn("Bearer <%s> rejected, duplicate priority\n", |
293 | name); | |
7216cd94 | 294 | return -EINVAL; |
b97bf3fd | 295 | } |
2cf8aa19 EH |
296 | pr_warn("Bearer <%s> priority adjustment required %u->%u\n", |
297 | name, priority + 1, priority); | |
b97bf3fd PL |
298 | goto restart; |
299 | } | |
300 | } | |
301 | if (bearer_id >= MAX_BEARERS) { | |
2cf8aa19 EH |
302 | pr_warn("Bearer <%s> rejected, bearer limit reached (%u)\n", |
303 | name, MAX_BEARERS); | |
7216cd94 | 304 | return -EINVAL; |
b97bf3fd PL |
305 | } |
306 | ||
1a90632d JPM |
307 | b = kzalloc(sizeof(*b), GFP_ATOMIC); |
308 | if (!b) | |
7216cd94 YX |
309 | return -ENOMEM; |
310 | ||
1a90632d JPM |
311 | strcpy(b->name, name); |
312 | b->media = m; | |
313 | res = m->enable_media(net, b, attr); | |
b97bf3fd | 314 | if (res) { |
2cf8aa19 EH |
315 | pr_warn("Bearer <%s> rejected, enable failure (%d)\n", |
316 | name, -res); | |
7216cd94 | 317 | return -EINVAL; |
b97bf3fd PL |
318 | } |
319 | ||
1a90632d JPM |
320 | b->identity = bearer_id; |
321 | b->tolerance = m->tolerance; | |
322 | b->window = m->window; | |
323 | b->domain = disc_domain; | |
324 | b->net_plane = bearer_id + 'A'; | |
325 | b->priority = priority; | |
3a777ff8 | 326 | |
4e801fa1 | 327 | res = tipc_disc_create(net, b, &b->bcast_addr, &skb); |
3a777ff8 | 328 | if (res) { |
1a90632d | 329 | bearer_disable(net, b); |
2cf8aa19 EH |
330 | pr_warn("Bearer <%s> rejected, discovery object creation failed\n", |
331 | name); | |
7216cd94 | 332 | return -EINVAL; |
3a777ff8 | 333 | } |
3874ccbb | 334 | |
1a90632d | 335 | rcu_assign_pointer(tn->bearer_list[bearer_id], b); |
4e801fa1 JPM |
336 | if (skb) |
337 | tipc_bearer_xmit_skb(net, bearer_id, skb, &b->bcast_addr); | |
35c55c98 JPM |
338 | |
339 | if (tipc_mon_create(net, bearer_id)) | |
340 | return -ENOMEM; | |
341 | ||
2cf8aa19 EH |
342 | pr_info("Enabled bearer <%s>, discovery domain %s, priority %u\n", |
343 | name, | |
344 | tipc_addr_string_fill(addr_string, disc_domain), priority); | |
b97bf3fd PL |
345 | return res; |
346 | } | |
347 | ||
348 | /** | |
512137ee | 349 | * tipc_reset_bearer - Reset all links established over this bearer |
b97bf3fd | 350 | */ |
1a90632d | 351 | static int tipc_reset_bearer(struct net *net, struct tipc_bearer *b) |
b97bf3fd | 352 | { |
1a90632d JPM |
353 | pr_info("Resetting bearer <%s>\n", b->name); |
354 | tipc_node_delete_links(net, b->identity); | |
355 | tipc_disc_reset(net, b); | |
0e35fd5e | 356 | return 0; |
b97bf3fd PL |
357 | } |
358 | ||
1fc07f3e JPM |
359 | /* tipc_bearer_reset_all - reset all links on all bearers |
360 | */ | |
361 | void tipc_bearer_reset_all(struct net *net) | |
362 | { | |
363 | struct tipc_net *tn = tipc_net(net); | |
364 | struct tipc_bearer *b; | |
365 | int i; | |
366 | ||
367 | for (i = 0; i < MAX_BEARERS; i++) { | |
368 | b = rcu_dereference_rtnl(tn->bearer_list[i]); | |
369 | if (b) | |
370 | tipc_reset_bearer(net, b); | |
371 | } | |
372 | } | |
373 | ||
b97bf3fd | 374 | /** |
617d3c7a | 375 | * bearer_disable |
c4307285 | 376 | * |
7216cd94 | 377 | * Note: This routine assumes caller holds RTNL lock. |
b97bf3fd | 378 | */ |
1a90632d | 379 | static void bearer_disable(struct net *net, struct tipc_bearer *b) |
b97bf3fd | 380 | { |
5b7066c3 JPM |
381 | struct tipc_net *tn = tipc_net(net); |
382 | int bearer_id = b->identity; | |
3874ccbb | 383 | |
1a90632d JPM |
384 | pr_info("Disabling bearer <%s>\n", b->name); |
385 | b->media->disable_media(b); | |
5b7066c3 | 386 | tipc_node_delete_links(net, bearer_id); |
1a90632d JPM |
387 | RCU_INIT_POINTER(b->media_ptr, NULL); |
388 | if (b->link_req) | |
389 | tipc_disc_delete(b->link_req); | |
5b7066c3 | 390 | RCU_INIT_POINTER(tn->bearer_list[bearer_id], NULL); |
1a90632d | 391 | kfree_rcu(b, rcu); |
35c55c98 | 392 | tipc_mon_delete(net, bearer_id); |
b97bf3fd PL |
393 | } |
394 | ||
d0f91938 EH |
395 | int tipc_enable_l2_media(struct net *net, struct tipc_bearer *b, |
396 | struct nlattr *attr[]) | |
e4d050cb YX |
397 | { |
398 | struct net_device *dev; | |
399 | char *driver_name = strchr((const char *)b->name, ':') + 1; | |
400 | ||
401 | /* Find device with specified name */ | |
7f9f95d9 | 402 | dev = dev_get_by_name(net, driver_name); |
e4d050cb YX |
403 | if (!dev) |
404 | return -ENODEV; | |
405 | ||
38504c28 | 406 | /* Associate TIPC bearer with L2 bearer */ |
2231c5af | 407 | rcu_assign_pointer(b->media_ptr, dev); |
38504c28 | 408 | memset(&b->bcast_addr, 0, sizeof(b->bcast_addr)); |
e4d050cb YX |
409 | memcpy(b->bcast_addr.value, dev->broadcast, b->media->hwaddr_len); |
410 | b->bcast_addr.media_id = b->media->type_id; | |
411 | b->bcast_addr.broadcast = 1; | |
412 | b->mtu = dev->mtu; | |
38504c28 | 413 | b->media->raw2addr(b, &b->addr, (char *)dev->dev_addr); |
e4d050cb YX |
414 | rcu_assign_pointer(dev->tipc_ptr, b); |
415 | return 0; | |
416 | } | |
417 | ||
38504c28 | 418 | /* tipc_disable_l2_media - detach TIPC bearer from an L2 interface |
e4d050cb | 419 | * |
282b3a05 | 420 | * Mark L2 bearer as inactive so that incoming buffers are thrown away |
e4d050cb YX |
421 | */ |
422 | void tipc_disable_l2_media(struct tipc_bearer *b) | |
423 | { | |
2231c5af YX |
424 | struct net_device *dev; |
425 | ||
426 | dev = (struct net_device *)rtnl_dereference(b->media_ptr); | |
e4d050cb | 427 | RCU_INIT_POINTER(dev->tipc_ptr, NULL); |
f1c8d8cb | 428 | synchronize_net(); |
e4d050cb YX |
429 | dev_put(dev); |
430 | } | |
431 | ||
432 | /** | |
38504c28 | 433 | * tipc_l2_send_msg - send a TIPC packet out over an L2 interface |
5b7066c3 | 434 | * @skb: the packet to be sent |
1a90632d | 435 | * @b: the bearer through which the packet is to be sent |
e4d050cb YX |
436 | * @dest: peer destination address |
437 | */ | |
7214bcf8 | 438 | int tipc_l2_send_msg(struct net *net, struct sk_buff *skb, |
1da46568 | 439 | struct tipc_bearer *b, struct tipc_media_addr *dest) |
e4d050cb | 440 | { |
2231c5af | 441 | struct net_device *dev; |
e4d050cb | 442 | int delta; |
5b7066c3 | 443 | void *tipc_ptr; |
2231c5af YX |
444 | |
445 | dev = (struct net_device *)rcu_dereference_rtnl(b->media_ptr); | |
446 | if (!dev) | |
447 | return 0; | |
e4d050cb | 448 | |
5b7066c3 | 449 | /* Send RESET message even if bearer is detached from device */ |
66d95b67 | 450 | tipc_ptr = rcu_dereference_rtnl(dev->tipc_ptr); |
5b7066c3 JPM |
451 | if (unlikely(!tipc_ptr && !msg_is_reset(buf_msg(skb)))) |
452 | goto drop; | |
453 | ||
7214bcf8 | 454 | delta = dev->hard_header_len - skb_headroom(skb); |
e4d050cb | 455 | if ((delta > 0) && |
5b7066c3 JPM |
456 | pskb_expand_head(skb, SKB_DATA_ALIGN(delta), 0, GFP_ATOMIC)) |
457 | goto drop; | |
e4d050cb | 458 | |
7214bcf8 JPM |
459 | skb_reset_network_header(skb); |
460 | skb->dev = dev; | |
461 | skb->protocol = htons(ETH_P_TIPC); | |
462 | dev_hard_header(skb, dev, ETH_P_TIPC, dest->value, | |
463 | dev->dev_addr, skb->len); | |
464 | dev_queue_xmit(skb); | |
e4d050cb | 465 | return 0; |
5b7066c3 JPM |
466 | drop: |
467 | kfree_skb(skb); | |
468 | return 0; | |
e4d050cb YX |
469 | } |
470 | ||
959e1781 JPM |
471 | int tipc_bearer_mtu(struct net *net, u32 bearer_id) |
472 | { | |
473 | int mtu = 0; | |
474 | struct tipc_bearer *b; | |
475 | ||
476 | rcu_read_lock(); | |
477 | b = rcu_dereference_rtnl(tipc_net(net)->bearer_list[bearer_id]); | |
478 | if (b) | |
479 | mtu = b->mtu; | |
480 | rcu_read_unlock(); | |
481 | return mtu; | |
482 | } | |
483 | ||
60852d67 JPM |
484 | /* tipc_bearer_xmit_skb - sends buffer to destination over bearer |
485 | */ | |
486 | void tipc_bearer_xmit_skb(struct net *net, u32 bearer_id, | |
487 | struct sk_buff *skb, | |
488 | struct tipc_media_addr *dest) | |
489 | { | |
490 | struct tipc_net *tn = tipc_net(net); | |
491 | struct tipc_bearer *b; | |
492 | ||
493 | rcu_read_lock(); | |
494 | b = rcu_dereference_rtnl(tn->bearer_list[bearer_id]); | |
495 | if (likely(b)) | |
496 | b->media->send_msg(net, skb, b, dest); | |
4e801fa1 JPM |
497 | else |
498 | kfree_skb(skb); | |
60852d67 | 499 | rcu_read_unlock(); |
60852d67 JPM |
500 | } |
501 | ||
af9b028e JPM |
502 | /* tipc_bearer_xmit() -send buffer to destination over bearer |
503 | */ | |
504 | void tipc_bearer_xmit(struct net *net, u32 bearer_id, | |
505 | struct sk_buff_head *xmitq, | |
506 | struct tipc_media_addr *dst) | |
507 | { | |
508 | struct tipc_net *tn = net_generic(net, tipc_net_id); | |
509 | struct tipc_bearer *b; | |
510 | struct sk_buff *skb, *tmp; | |
511 | ||
512 | if (skb_queue_empty(xmitq)) | |
513 | return; | |
514 | ||
515 | rcu_read_lock(); | |
516 | b = rcu_dereference_rtnl(tn->bearer_list[bearer_id]); | |
4e801fa1 JPM |
517 | if (unlikely(!b)) |
518 | __skb_queue_purge(xmitq); | |
519 | skb_queue_walk_safe(xmitq, skb, tmp) { | |
520 | __skb_dequeue(xmitq); | |
521 | b->media->send_msg(net, skb, b, dst); | |
b06b281e JPM |
522 | } |
523 | rcu_read_unlock(); | |
524 | } | |
525 | ||
526 | /* tipc_bearer_bc_xmit() - broadcast buffers to all destinations | |
527 | */ | |
528 | void tipc_bearer_bc_xmit(struct net *net, u32 bearer_id, | |
529 | struct sk_buff_head *xmitq) | |
530 | { | |
531 | struct tipc_net *tn = tipc_net(net); | |
532 | int net_id = tn->net_id; | |
533 | struct tipc_bearer *b; | |
534 | struct sk_buff *skb, *tmp; | |
535 | struct tipc_msg *hdr; | |
536 | ||
537 | rcu_read_lock(); | |
538 | b = rcu_dereference_rtnl(tn->bearer_list[bearer_id]); | |
4e801fa1 JPM |
539 | if (unlikely(!b)) |
540 | __skb_queue_purge(xmitq); | |
541 | skb_queue_walk_safe(xmitq, skb, tmp) { | |
542 | hdr = buf_msg(skb); | |
543 | msg_set_non_seq(hdr, 1); | |
544 | msg_set_mc_netid(hdr, net_id); | |
545 | __skb_dequeue(xmitq); | |
546 | b->media->send_msg(net, skb, b, &b->bcast_addr); | |
af9b028e JPM |
547 | } |
548 | rcu_read_unlock(); | |
549 | } | |
550 | ||
6e967adf YX |
551 | /** |
552 | * tipc_l2_rcv_msg - handle incoming TIPC message from an interface | |
553 | * @buf: the received packet | |
554 | * @dev: the net device that the packet was received on | |
555 | * @pt: the packet_type structure which was used to register this handler | |
556 | * @orig_dev: the original receive net device in case the device is a bond | |
557 | * | |
558 | * Accept only packets explicitly sent to this node, or broadcast packets; | |
559 | * ignores packets sent using interface multicast, and traffic sent to other | |
560 | * nodes (which can happen if interface is running in promiscuous mode). | |
561 | */ | |
4e801fa1 | 562 | static int tipc_l2_rcv_msg(struct sk_buff *skb, struct net_device *dev, |
6e967adf YX |
563 | struct packet_type *pt, struct net_device *orig_dev) |
564 | { | |
1a90632d | 565 | struct tipc_bearer *b; |
6e967adf | 566 | |
6e967adf | 567 | rcu_read_lock(); |
1a90632d | 568 | b = rcu_dereference_rtnl(dev->tipc_ptr); |
4e801fa1 JPM |
569 | if (likely(b && (skb->pkt_type <= PACKET_BROADCAST))) { |
570 | skb->next = NULL; | |
571 | tipc_rcv(dev_net(dev), skb, b); | |
572 | rcu_read_unlock(); | |
573 | return NET_RX_SUCCESS; | |
6e967adf YX |
574 | } |
575 | rcu_read_unlock(); | |
4e801fa1 | 576 | kfree_skb(skb); |
6e967adf YX |
577 | return NET_RX_DROP; |
578 | } | |
579 | ||
580 | /** | |
581 | * tipc_l2_device_event - handle device events from network device | |
582 | * @nb: the context of the notification | |
583 | * @evt: the type of event | |
584 | * @ptr: the net device that the event was on | |
585 | * | |
586 | * This function is called by the Ethernet driver in case of link | |
587 | * change event. | |
588 | */ | |
589 | static int tipc_l2_device_event(struct notifier_block *nb, unsigned long evt, | |
590 | void *ptr) | |
591 | { | |
6e967adf | 592 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
c93d3baa | 593 | struct net *net = dev_net(dev); |
5b7066c3 | 594 | struct tipc_net *tn = tipc_net(net); |
1a90632d | 595 | struct tipc_bearer *b; |
5b7066c3 | 596 | int i; |
6e967adf | 597 | |
1a90632d | 598 | b = rtnl_dereference(dev->tipc_ptr); |
5b7066c3 JPM |
599 | if (!b) { |
600 | for (i = 0; i < MAX_BEARERS; b = NULL, i++) { | |
601 | b = rtnl_dereference(tn->bearer_list[i]); | |
602 | if (b && (b->media_ptr == dev)) | |
603 | break; | |
604 | } | |
605 | } | |
1a90632d | 606 | if (!b) |
6e967adf | 607 | return NOTIFY_DONE; |
6e967adf | 608 | |
1a90632d | 609 | b->mtu = dev->mtu; |
6e967adf YX |
610 | |
611 | switch (evt) { | |
612 | case NETDEV_CHANGE: | |
613 | if (netif_carrier_ok(dev)) | |
614 | break; | |
5b7066c3 JPM |
615 | case NETDEV_UP: |
616 | rcu_assign_pointer(dev->tipc_ptr, b); | |
617 | break; | |
282b3a05 | 618 | case NETDEV_GOING_DOWN: |
5b7066c3 JPM |
619 | RCU_INIT_POINTER(dev->tipc_ptr, NULL); |
620 | synchronize_net(); | |
621 | tipc_reset_bearer(net, b); | |
622 | break; | |
6e967adf | 623 | case NETDEV_CHANGEMTU: |
1a90632d | 624 | tipc_reset_bearer(net, b); |
a21a584d | 625 | break; |
6e967adf | 626 | case NETDEV_CHANGEADDR: |
1a90632d | 627 | b->media->raw2addr(b, &b->addr, |
5b7066c3 | 628 | (char *)dev->dev_addr); |
1a90632d | 629 | tipc_reset_bearer(net, b); |
6e967adf YX |
630 | break; |
631 | case NETDEV_UNREGISTER: | |
632 | case NETDEV_CHANGENAME: | |
1a90632d | 633 | bearer_disable(dev_net(dev), b); |
6e967adf YX |
634 | break; |
635 | } | |
6e967adf YX |
636 | return NOTIFY_OK; |
637 | } | |
638 | ||
639 | static struct packet_type tipc_packet_type __read_mostly = { | |
184593c7 | 640 | .type = htons(ETH_P_TIPC), |
6e967adf YX |
641 | .func = tipc_l2_rcv_msg, |
642 | }; | |
643 | ||
644 | static struct notifier_block notifier = { | |
645 | .notifier_call = tipc_l2_device_event, | |
646 | .priority = 0, | |
647 | }; | |
648 | ||
649 | int tipc_bearer_setup(void) | |
650 | { | |
970122fd YX |
651 | int err; |
652 | ||
653 | err = register_netdevice_notifier(¬ifier); | |
654 | if (err) | |
655 | return err; | |
6e967adf | 656 | dev_add_pack(&tipc_packet_type); |
970122fd | 657 | return 0; |
6e967adf YX |
658 | } |
659 | ||
660 | void tipc_bearer_cleanup(void) | |
661 | { | |
662 | unregister_netdevice_notifier(¬ifier); | |
663 | dev_remove_pack(&tipc_packet_type); | |
664 | } | |
b97bf3fd | 665 | |
f2f9800d | 666 | void tipc_bearer_stop(struct net *net) |
b97bf3fd | 667 | { |
7f9f95d9 | 668 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
1a90632d | 669 | struct tipc_bearer *b; |
b97bf3fd PL |
670 | u32 i; |
671 | ||
b97bf3fd | 672 | for (i = 0; i < MAX_BEARERS; i++) { |
1a90632d JPM |
673 | b = rtnl_dereference(tn->bearer_list[i]); |
674 | if (b) { | |
675 | bearer_disable(net, b); | |
7f9f95d9 | 676 | tn->bearer_list[i] = NULL; |
3874ccbb | 677 | } |
b97bf3fd | 678 | } |
b97bf3fd | 679 | } |
0655f6a8 | 680 | |
35b9dd76 | 681 | /* Caller should hold rtnl_lock to protect the bearer */ |
d8182804 | 682 | static int __tipc_nl_add_bearer(struct tipc_nl_msg *msg, |
f2f67390 | 683 | struct tipc_bearer *bearer, int nlflags) |
35b9dd76 RA |
684 | { |
685 | void *hdr; | |
686 | struct nlattr *attrs; | |
687 | struct nlattr *prop; | |
688 | ||
bfb3e5dd | 689 | hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family, |
f2f67390 | 690 | nlflags, TIPC_NL_BEARER_GET); |
35b9dd76 RA |
691 | if (!hdr) |
692 | return -EMSGSIZE; | |
693 | ||
694 | attrs = nla_nest_start(msg->skb, TIPC_NLA_BEARER); | |
695 | if (!attrs) | |
696 | goto msg_full; | |
697 | ||
698 | if (nla_put_string(msg->skb, TIPC_NLA_BEARER_NAME, bearer->name)) | |
699 | goto attr_msg_full; | |
700 | ||
701 | prop = nla_nest_start(msg->skb, TIPC_NLA_BEARER_PROP); | |
702 | if (!prop) | |
703 | goto prop_msg_full; | |
704 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, bearer->priority)) | |
705 | goto prop_msg_full; | |
706 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, bearer->tolerance)) | |
707 | goto prop_msg_full; | |
708 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, bearer->window)) | |
709 | goto prop_msg_full; | |
710 | ||
711 | nla_nest_end(msg->skb, prop); | |
712 | nla_nest_end(msg->skb, attrs); | |
713 | genlmsg_end(msg->skb, hdr); | |
714 | ||
715 | return 0; | |
716 | ||
717 | prop_msg_full: | |
718 | nla_nest_cancel(msg->skb, prop); | |
719 | attr_msg_full: | |
720 | nla_nest_cancel(msg->skb, attrs); | |
721 | msg_full: | |
722 | genlmsg_cancel(msg->skb, hdr); | |
723 | ||
724 | return -EMSGSIZE; | |
725 | } | |
726 | ||
727 | int tipc_nl_bearer_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
728 | { | |
729 | int err; | |
730 | int i = cb->args[0]; | |
731 | struct tipc_bearer *bearer; | |
732 | struct tipc_nl_msg msg; | |
7f9f95d9 YX |
733 | struct net *net = sock_net(skb->sk); |
734 | struct tipc_net *tn = net_generic(net, tipc_net_id); | |
35b9dd76 RA |
735 | |
736 | if (i == MAX_BEARERS) | |
737 | return 0; | |
738 | ||
739 | msg.skb = skb; | |
740 | msg.portid = NETLINK_CB(cb->skb).portid; | |
741 | msg.seq = cb->nlh->nlmsg_seq; | |
742 | ||
743 | rtnl_lock(); | |
744 | for (i = 0; i < MAX_BEARERS; i++) { | |
7f9f95d9 | 745 | bearer = rtnl_dereference(tn->bearer_list[i]); |
35b9dd76 RA |
746 | if (!bearer) |
747 | continue; | |
748 | ||
f2f67390 | 749 | err = __tipc_nl_add_bearer(&msg, bearer, NLM_F_MULTI); |
35b9dd76 RA |
750 | if (err) |
751 | break; | |
752 | } | |
753 | rtnl_unlock(); | |
754 | ||
755 | cb->args[0] = i; | |
756 | return skb->len; | |
757 | } | |
758 | ||
759 | int tipc_nl_bearer_get(struct sk_buff *skb, struct genl_info *info) | |
760 | { | |
761 | int err; | |
762 | char *name; | |
763 | struct sk_buff *rep; | |
764 | struct tipc_bearer *bearer; | |
765 | struct tipc_nl_msg msg; | |
766 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
7f9f95d9 | 767 | struct net *net = genl_info_net(info); |
35b9dd76 RA |
768 | |
769 | if (!info->attrs[TIPC_NLA_BEARER]) | |
770 | return -EINVAL; | |
771 | ||
772 | err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX, | |
773 | info->attrs[TIPC_NLA_BEARER], | |
774 | tipc_nl_bearer_policy); | |
775 | if (err) | |
776 | return err; | |
777 | ||
778 | if (!attrs[TIPC_NLA_BEARER_NAME]) | |
779 | return -EINVAL; | |
780 | name = nla_data(attrs[TIPC_NLA_BEARER_NAME]); | |
781 | ||
782 | rep = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); | |
783 | if (!rep) | |
784 | return -ENOMEM; | |
785 | ||
786 | msg.skb = rep; | |
787 | msg.portid = info->snd_portid; | |
788 | msg.seq = info->snd_seq; | |
789 | ||
790 | rtnl_lock(); | |
7f9f95d9 | 791 | bearer = tipc_bearer_find(net, name); |
35b9dd76 RA |
792 | if (!bearer) { |
793 | err = -EINVAL; | |
794 | goto err_out; | |
795 | } | |
796 | ||
f2f67390 | 797 | err = __tipc_nl_add_bearer(&msg, bearer, 0); |
35b9dd76 RA |
798 | if (err) |
799 | goto err_out; | |
800 | rtnl_unlock(); | |
801 | ||
802 | return genlmsg_reply(rep, info); | |
803 | err_out: | |
804 | rtnl_unlock(); | |
805 | nlmsg_free(rep); | |
806 | ||
807 | return err; | |
808 | } | |
809 | ||
0655f6a8 RA |
810 | int tipc_nl_bearer_disable(struct sk_buff *skb, struct genl_info *info) |
811 | { | |
812 | int err; | |
813 | char *name; | |
814 | struct tipc_bearer *bearer; | |
815 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
9ab15465 | 816 | struct net *net = sock_net(skb->sk); |
0655f6a8 RA |
817 | |
818 | if (!info->attrs[TIPC_NLA_BEARER]) | |
819 | return -EINVAL; | |
820 | ||
821 | err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX, | |
822 | info->attrs[TIPC_NLA_BEARER], | |
823 | tipc_nl_bearer_policy); | |
824 | if (err) | |
825 | return err; | |
826 | ||
827 | if (!attrs[TIPC_NLA_BEARER_NAME]) | |
828 | return -EINVAL; | |
829 | ||
830 | name = nla_data(attrs[TIPC_NLA_BEARER_NAME]); | |
831 | ||
832 | rtnl_lock(); | |
7f9f95d9 | 833 | bearer = tipc_bearer_find(net, name); |
0655f6a8 RA |
834 | if (!bearer) { |
835 | rtnl_unlock(); | |
836 | return -EINVAL; | |
837 | } | |
838 | ||
b1c29f6b | 839 | bearer_disable(net, bearer); |
0655f6a8 RA |
840 | rtnl_unlock(); |
841 | ||
842 | return 0; | |
843 | } | |
844 | ||
845 | int tipc_nl_bearer_enable(struct sk_buff *skb, struct genl_info *info) | |
846 | { | |
847 | int err; | |
848 | char *bearer; | |
849 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
9ab15465 RA |
850 | struct net *net = sock_net(skb->sk); |
851 | struct tipc_net *tn = net_generic(net, tipc_net_id); | |
0655f6a8 RA |
852 | u32 domain; |
853 | u32 prio; | |
854 | ||
855 | prio = TIPC_MEDIA_LINK_PRI; | |
9ff26e9f | 856 | domain = tn->own_addr & TIPC_ZONE_CLUSTER_MASK; |
0655f6a8 RA |
857 | |
858 | if (!info->attrs[TIPC_NLA_BEARER]) | |
859 | return -EINVAL; | |
860 | ||
861 | err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX, | |
862 | info->attrs[TIPC_NLA_BEARER], | |
863 | tipc_nl_bearer_policy); | |
864 | if (err) | |
865 | return err; | |
866 | ||
867 | if (!attrs[TIPC_NLA_BEARER_NAME]) | |
868 | return -EINVAL; | |
869 | ||
870 | bearer = nla_data(attrs[TIPC_NLA_BEARER_NAME]); | |
871 | ||
872 | if (attrs[TIPC_NLA_BEARER_DOMAIN]) | |
873 | domain = nla_get_u32(attrs[TIPC_NLA_BEARER_DOMAIN]); | |
874 | ||
875 | if (attrs[TIPC_NLA_BEARER_PROP]) { | |
876 | struct nlattr *props[TIPC_NLA_PROP_MAX + 1]; | |
877 | ||
878 | err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_BEARER_PROP], | |
879 | props); | |
880 | if (err) | |
881 | return err; | |
882 | ||
883 | if (props[TIPC_NLA_PROP_PRIO]) | |
884 | prio = nla_get_u32(props[TIPC_NLA_PROP_PRIO]); | |
885 | } | |
886 | ||
887 | rtnl_lock(); | |
d0f91938 | 888 | err = tipc_enable_bearer(net, bearer, domain, prio, attrs); |
0655f6a8 RA |
889 | if (err) { |
890 | rtnl_unlock(); | |
891 | return err; | |
892 | } | |
893 | rtnl_unlock(); | |
894 | ||
895 | return 0; | |
896 | } | |
315c00bc RA |
897 | |
898 | int tipc_nl_bearer_set(struct sk_buff *skb, struct genl_info *info) | |
899 | { | |
900 | int err; | |
901 | char *name; | |
902 | struct tipc_bearer *b; | |
903 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
c3d6fb85 | 904 | struct net *net = sock_net(skb->sk); |
315c00bc RA |
905 | |
906 | if (!info->attrs[TIPC_NLA_BEARER]) | |
907 | return -EINVAL; | |
908 | ||
909 | err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX, | |
910 | info->attrs[TIPC_NLA_BEARER], | |
911 | tipc_nl_bearer_policy); | |
912 | if (err) | |
913 | return err; | |
914 | ||
915 | if (!attrs[TIPC_NLA_BEARER_NAME]) | |
916 | return -EINVAL; | |
917 | name = nla_data(attrs[TIPC_NLA_BEARER_NAME]); | |
918 | ||
919 | rtnl_lock(); | |
7f9f95d9 | 920 | b = tipc_bearer_find(net, name); |
315c00bc RA |
921 | if (!b) { |
922 | rtnl_unlock(); | |
923 | return -EINVAL; | |
924 | } | |
925 | ||
926 | if (attrs[TIPC_NLA_BEARER_PROP]) { | |
927 | struct nlattr *props[TIPC_NLA_PROP_MAX + 1]; | |
928 | ||
929 | err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_BEARER_PROP], | |
930 | props); | |
931 | if (err) { | |
932 | rtnl_unlock(); | |
933 | return err; | |
934 | } | |
935 | ||
936 | if (props[TIPC_NLA_PROP_TOL]) | |
937 | b->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]); | |
938 | if (props[TIPC_NLA_PROP_PRIO]) | |
939 | b->priority = nla_get_u32(props[TIPC_NLA_PROP_PRIO]); | |
940 | if (props[TIPC_NLA_PROP_WIN]) | |
941 | b->window = nla_get_u32(props[TIPC_NLA_PROP_WIN]); | |
942 | } | |
943 | rtnl_unlock(); | |
944 | ||
945 | return 0; | |
946 | } | |
46f15c67 | 947 | |
d8182804 | 948 | static int __tipc_nl_add_media(struct tipc_nl_msg *msg, |
f2f67390 | 949 | struct tipc_media *media, int nlflags) |
46f15c67 RA |
950 | { |
951 | void *hdr; | |
952 | struct nlattr *attrs; | |
953 | struct nlattr *prop; | |
954 | ||
bfb3e5dd | 955 | hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family, |
f2f67390 | 956 | nlflags, TIPC_NL_MEDIA_GET); |
46f15c67 RA |
957 | if (!hdr) |
958 | return -EMSGSIZE; | |
959 | ||
960 | attrs = nla_nest_start(msg->skb, TIPC_NLA_MEDIA); | |
961 | if (!attrs) | |
962 | goto msg_full; | |
963 | ||
964 | if (nla_put_string(msg->skb, TIPC_NLA_MEDIA_NAME, media->name)) | |
965 | goto attr_msg_full; | |
966 | ||
967 | prop = nla_nest_start(msg->skb, TIPC_NLA_MEDIA_PROP); | |
968 | if (!prop) | |
969 | goto prop_msg_full; | |
970 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, media->priority)) | |
971 | goto prop_msg_full; | |
972 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, media->tolerance)) | |
973 | goto prop_msg_full; | |
974 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, media->window)) | |
975 | goto prop_msg_full; | |
976 | ||
977 | nla_nest_end(msg->skb, prop); | |
978 | nla_nest_end(msg->skb, attrs); | |
979 | genlmsg_end(msg->skb, hdr); | |
980 | ||
981 | return 0; | |
982 | ||
983 | prop_msg_full: | |
984 | nla_nest_cancel(msg->skb, prop); | |
985 | attr_msg_full: | |
986 | nla_nest_cancel(msg->skb, attrs); | |
987 | msg_full: | |
988 | genlmsg_cancel(msg->skb, hdr); | |
989 | ||
990 | return -EMSGSIZE; | |
991 | } | |
992 | ||
993 | int tipc_nl_media_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
994 | { | |
995 | int err; | |
996 | int i = cb->args[0]; | |
997 | struct tipc_nl_msg msg; | |
998 | ||
999 | if (i == MAX_MEDIA) | |
1000 | return 0; | |
1001 | ||
1002 | msg.skb = skb; | |
1003 | msg.portid = NETLINK_CB(cb->skb).portid; | |
1004 | msg.seq = cb->nlh->nlmsg_seq; | |
1005 | ||
1006 | rtnl_lock(); | |
1007 | for (; media_info_array[i] != NULL; i++) { | |
f2f67390 ND |
1008 | err = __tipc_nl_add_media(&msg, media_info_array[i], |
1009 | NLM_F_MULTI); | |
46f15c67 RA |
1010 | if (err) |
1011 | break; | |
1012 | } | |
1013 | rtnl_unlock(); | |
1014 | ||
1015 | cb->args[0] = i; | |
1016 | return skb->len; | |
1017 | } | |
1018 | ||
1019 | int tipc_nl_media_get(struct sk_buff *skb, struct genl_info *info) | |
1020 | { | |
1021 | int err; | |
1022 | char *name; | |
1023 | struct tipc_nl_msg msg; | |
1024 | struct tipc_media *media; | |
1025 | struct sk_buff *rep; | |
1026 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
1027 | ||
1028 | if (!info->attrs[TIPC_NLA_MEDIA]) | |
1029 | return -EINVAL; | |
1030 | ||
1031 | err = nla_parse_nested(attrs, TIPC_NLA_MEDIA_MAX, | |
1032 | info->attrs[TIPC_NLA_MEDIA], | |
1033 | tipc_nl_media_policy); | |
1034 | if (err) | |
1035 | return err; | |
1036 | ||
1037 | if (!attrs[TIPC_NLA_MEDIA_NAME]) | |
1038 | return -EINVAL; | |
1039 | name = nla_data(attrs[TIPC_NLA_MEDIA_NAME]); | |
1040 | ||
1041 | rep = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); | |
1042 | if (!rep) | |
1043 | return -ENOMEM; | |
1044 | ||
1045 | msg.skb = rep; | |
1046 | msg.portid = info->snd_portid; | |
1047 | msg.seq = info->snd_seq; | |
1048 | ||
1049 | rtnl_lock(); | |
1050 | media = tipc_media_find(name); | |
1051 | if (!media) { | |
1052 | err = -EINVAL; | |
1053 | goto err_out; | |
1054 | } | |
1055 | ||
f2f67390 | 1056 | err = __tipc_nl_add_media(&msg, media, 0); |
46f15c67 RA |
1057 | if (err) |
1058 | goto err_out; | |
1059 | rtnl_unlock(); | |
1060 | ||
1061 | return genlmsg_reply(rep, info); | |
1062 | err_out: | |
1063 | rtnl_unlock(); | |
1064 | nlmsg_free(rep); | |
1065 | ||
1066 | return err; | |
1067 | } | |
1e55417d RA |
1068 | |
1069 | int tipc_nl_media_set(struct sk_buff *skb, struct genl_info *info) | |
1070 | { | |
1071 | int err; | |
1072 | char *name; | |
1073 | struct tipc_media *m; | |
1074 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
1075 | ||
1076 | if (!info->attrs[TIPC_NLA_MEDIA]) | |
1077 | return -EINVAL; | |
1078 | ||
1079 | err = nla_parse_nested(attrs, TIPC_NLA_MEDIA_MAX, | |
1080 | info->attrs[TIPC_NLA_MEDIA], | |
1081 | tipc_nl_media_policy); | |
1082 | ||
1083 | if (!attrs[TIPC_NLA_MEDIA_NAME]) | |
1084 | return -EINVAL; | |
1085 | name = nla_data(attrs[TIPC_NLA_MEDIA_NAME]); | |
1086 | ||
1087 | rtnl_lock(); | |
1088 | m = tipc_media_find(name); | |
1089 | if (!m) { | |
1090 | rtnl_unlock(); | |
1091 | return -EINVAL; | |
1092 | } | |
1093 | ||
1094 | if (attrs[TIPC_NLA_MEDIA_PROP]) { | |
1095 | struct nlattr *props[TIPC_NLA_PROP_MAX + 1]; | |
1096 | ||
1097 | err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_MEDIA_PROP], | |
1098 | props); | |
1099 | if (err) { | |
1100 | rtnl_unlock(); | |
1101 | return err; | |
1102 | } | |
1103 | ||
1104 | if (props[TIPC_NLA_PROP_TOL]) | |
1105 | m->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]); | |
1106 | if (props[TIPC_NLA_PROP_PRIO]) | |
1107 | m->priority = nla_get_u32(props[TIPC_NLA_PROP_PRIO]); | |
1108 | if (props[TIPC_NLA_PROP_WIN]) | |
1109 | m->window = nla_get_u32(props[TIPC_NLA_PROP_WIN]); | |
1110 | } | |
1111 | rtnl_unlock(); | |
1112 | ||
1113 | return 0; | |
1114 | } |