Commit | Line | Data |
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b97bf3fd PL |
1 | /* |
2 | * net/tipc/bearer.c: TIPC bearer code | |
c4307285 | 3 | * |
0655f6a8 | 4 | * Copyright (c) 1996-2006, 2013-2014, 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" |
1da46568 | 42 | #include "bcast.h" |
b97bf3fd | 43 | |
a29a194a | 44 | #define MAX_ADDR_STR 60 |
b97bf3fd | 45 | |
ef72a7e0 | 46 | static struct tipc_media * const media_info_array[] = { |
5702dbab JPM |
47 | ð_media_info, |
48 | #ifdef CONFIG_TIPC_MEDIA_IB | |
49 | &ib_media_info, | |
50 | #endif | |
51 | NULL | |
52 | }; | |
b97bf3fd | 53 | |
0655f6a8 RA |
54 | static const struct nla_policy |
55 | tipc_nl_bearer_policy[TIPC_NLA_BEARER_MAX + 1] = { | |
56 | [TIPC_NLA_BEARER_UNSPEC] = { .type = NLA_UNSPEC }, | |
57 | [TIPC_NLA_BEARER_NAME] = { | |
58 | .type = NLA_STRING, | |
59 | .len = TIPC_MAX_BEARER_NAME | |
60 | }, | |
61 | [TIPC_NLA_BEARER_PROP] = { .type = NLA_NESTED }, | |
62 | [TIPC_NLA_BEARER_DOMAIN] = { .type = NLA_U32 } | |
63 | }; | |
64 | ||
46f15c67 RA |
65 | static const struct nla_policy tipc_nl_media_policy[TIPC_NLA_MEDIA_MAX + 1] = { |
66 | [TIPC_NLA_MEDIA_UNSPEC] = { .type = NLA_UNSPEC }, | |
67 | [TIPC_NLA_MEDIA_NAME] = { .type = NLA_STRING }, | |
68 | [TIPC_NLA_MEDIA_PROP] = { .type = NLA_NESTED } | |
69 | }; | |
70 | ||
f2f9800d YX |
71 | static void bearer_disable(struct net *net, struct tipc_bearer *b_ptr, |
72 | bool shutting_down); | |
3a777ff8 | 73 | |
b97bf3fd | 74 | /** |
5c216e1d | 75 | * tipc_media_find - locates specified media object by name |
b97bf3fd | 76 | */ |
358a0d1c | 77 | struct tipc_media *tipc_media_find(const char *name) |
b97bf3fd | 78 | { |
b97bf3fd PL |
79 | u32 i; |
80 | ||
ef72a7e0 JPM |
81 | for (i = 0; media_info_array[i] != NULL; i++) { |
82 | if (!strcmp(media_info_array[i]->name, name)) | |
5702dbab | 83 | break; |
b97bf3fd | 84 | } |
ef72a7e0 | 85 | return media_info_array[i]; |
b97bf3fd PL |
86 | } |
87 | ||
c79be454 AS |
88 | /** |
89 | * media_find_id - locates specified media object by type identifier | |
90 | */ | |
358a0d1c | 91 | static struct tipc_media *media_find_id(u8 type) |
c79be454 AS |
92 | { |
93 | u32 i; | |
94 | ||
ef72a7e0 JPM |
95 | for (i = 0; media_info_array[i] != NULL; i++) { |
96 | if (media_info_array[i]->type_id == type) | |
5702dbab | 97 | break; |
c79be454 | 98 | } |
ef72a7e0 | 99 | return media_info_array[i]; |
b97bf3fd PL |
100 | } |
101 | ||
102 | /** | |
4323add6 | 103 | * tipc_media_addr_printf - record media address in print buffer |
b97bf3fd | 104 | */ |
dc1aed37 | 105 | void tipc_media_addr_printf(char *buf, int len, struct tipc_media_addr *a) |
b97bf3fd | 106 | { |
c61b666e | 107 | char addr_str[MAX_ADDR_STR]; |
358a0d1c | 108 | struct tipc_media *m_ptr; |
dc1aed37 | 109 | int ret; |
b97bf3fd | 110 | |
3d749a6a | 111 | m_ptr = media_find_id(a->media_id); |
b97bf3fd | 112 | |
c61b666e | 113 | if (m_ptr && !m_ptr->addr2str(a, addr_str, sizeof(addr_str))) |
941787b8 | 114 | ret = scnprintf(buf, len, "%s(%s)", m_ptr->name, addr_str); |
c61b666e | 115 | else { |
c61b666e | 116 | u32 i; |
b97bf3fd | 117 | |
941787b8 | 118 | ret = scnprintf(buf, len, "UNKNOWN(%u)", a->media_id); |
3d749a6a | 119 | for (i = 0; i < sizeof(a->value); i++) |
941787b8 | 120 | ret += scnprintf(buf - ret, len + ret, |
dc1aed37 | 121 | "-%02x", a->value[i]); |
b97bf3fd PL |
122 | } |
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); |
2d627b92 | 176 | struct tipc_bearer *b_ptr; |
b97bf3fd PL |
177 | u32 i; |
178 | ||
3874ccbb | 179 | for (i = 0; i < MAX_BEARERS; i++) { |
7f9f95d9 | 180 | b_ptr = rtnl_dereference(tn->bearer_list[i]); |
f47de12b | 181 | if (b_ptr && (!strcmp(b_ptr->name, name))) |
b97bf3fd PL |
182 | return b_ptr; |
183 | } | |
1fc54d8f | 184 | return NULL; |
b97bf3fd PL |
185 | } |
186 | ||
7f9f95d9 | 187 | void tipc_bearer_add_dest(struct net *net, u32 bearer_id, u32 dest) |
b97bf3fd | 188 | { |
7f9f95d9 | 189 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
7a2f7d18 YX |
190 | struct tipc_bearer *b_ptr; |
191 | ||
192 | rcu_read_lock(); | |
7f9f95d9 | 193 | b_ptr = rcu_dereference_rtnl(tn->bearer_list[bearer_id]); |
7a2f7d18 | 194 | if (b_ptr) { |
7f9f95d9 | 195 | tipc_bcbearer_sort(net, &b_ptr->nodes, dest, true); |
7a2f7d18 YX |
196 | tipc_disc_add_dest(b_ptr->link_req); |
197 | } | |
198 | rcu_read_unlock(); | |
b97bf3fd PL |
199 | } |
200 | ||
7f9f95d9 | 201 | void tipc_bearer_remove_dest(struct net *net, u32 bearer_id, u32 dest) |
b97bf3fd | 202 | { |
7f9f95d9 | 203 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
7a2f7d18 YX |
204 | struct tipc_bearer *b_ptr; |
205 | ||
206 | rcu_read_lock(); | |
7f9f95d9 | 207 | b_ptr = rcu_dereference_rtnl(tn->bearer_list[bearer_id]); |
7a2f7d18 | 208 | if (b_ptr) { |
7f9f95d9 | 209 | tipc_bcbearer_sort(net, &b_ptr->nodes, dest, false); |
7a2f7d18 YX |
210 | tipc_disc_remove_dest(b_ptr->link_req); |
211 | } | |
212 | rcu_read_unlock(); | |
b97bf3fd PL |
213 | } |
214 | ||
b97bf3fd PL |
215 | /** |
216 | * tipc_enable_bearer - enable bearer with the given name | |
c4307285 | 217 | */ |
9ab15465 RA |
218 | static int tipc_enable_bearer(struct net *net, const char *name, |
219 | u32 disc_domain, u32 priority) | |
b97bf3fd | 220 | { |
7f9f95d9 | 221 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
2d627b92 | 222 | struct tipc_bearer *b_ptr; |
358a0d1c | 223 | struct tipc_media *m_ptr; |
f19765f4 | 224 | struct tipc_bearer_names b_names; |
b97bf3fd PL |
225 | char addr_string[16]; |
226 | u32 bearer_id; | |
227 | u32 with_this_prio; | |
228 | u32 i; | |
229 | int res = -EINVAL; | |
230 | ||
34747539 | 231 | if (!tn->own_addr) { |
2cf8aa19 EH |
232 | pr_warn("Bearer <%s> rejected, not supported in standalone mode\n", |
233 | name); | |
b97bf3fd | 234 | return -ENOPROTOOPT; |
a10bd924 | 235 | } |
f19765f4 | 236 | if (!bearer_name_validate(name, &b_names)) { |
2cf8aa19 | 237 | pr_warn("Bearer <%s> rejected, illegal name\n", name); |
16cb4b33 | 238 | return -EINVAL; |
a10bd924 | 239 | } |
66e019a6 | 240 | if (tipc_addr_domain_valid(disc_domain) && |
34747539 YX |
241 | (disc_domain != tn->own_addr)) { |
242 | if (tipc_in_scope(disc_domain, tn->own_addr)) { | |
243 | disc_domain = tn->own_addr & TIPC_CLUSTER_MASK; | |
66e019a6 | 244 | res = 0; /* accept any node in own cluster */ |
34747539 | 245 | } else if (in_own_cluster_exact(net, disc_domain)) |
66e019a6 AS |
246 | res = 0; /* accept specified node in own cluster */ |
247 | } | |
248 | if (res) { | |
2cf8aa19 EH |
249 | pr_warn("Bearer <%s> rejected, illegal discovery domain\n", |
250 | name); | |
a10bd924 AS |
251 | return -EINVAL; |
252 | } | |
9efde4a0 | 253 | if ((priority > TIPC_MAX_LINK_PRI) && |
a10bd924 | 254 | (priority != TIPC_MEDIA_LINK_PRI)) { |
2cf8aa19 | 255 | pr_warn("Bearer <%s> rejected, illegal priority\n", name); |
b97bf3fd | 256 | return -EINVAL; |
a10bd924 | 257 | } |
b97bf3fd | 258 | |
f19765f4 | 259 | m_ptr = tipc_media_find(b_names.media_name); |
b97bf3fd | 260 | if (!m_ptr) { |
2cf8aa19 EH |
261 | pr_warn("Bearer <%s> rejected, media <%s> not registered\n", |
262 | name, b_names.media_name); | |
7216cd94 | 263 | return -EINVAL; |
b97bf3fd | 264 | } |
16cb4b33 PL |
265 | |
266 | if (priority == TIPC_MEDIA_LINK_PRI) | |
b97bf3fd PL |
267 | priority = m_ptr->priority; |
268 | ||
269 | restart: | |
270 | bearer_id = MAX_BEARERS; | |
271 | with_this_prio = 1; | |
272 | for (i = MAX_BEARERS; i-- != 0; ) { | |
7f9f95d9 | 273 | b_ptr = rtnl_dereference(tn->bearer_list[i]); |
f47de12b | 274 | if (!b_ptr) { |
b97bf3fd PL |
275 | bearer_id = i; |
276 | continue; | |
277 | } | |
3874ccbb | 278 | if (!strcmp(name, b_ptr->name)) { |
2cf8aa19 EH |
279 | pr_warn("Bearer <%s> rejected, already enabled\n", |
280 | name); | |
7216cd94 | 281 | return -EINVAL; |
b97bf3fd | 282 | } |
3874ccbb | 283 | if ((b_ptr->priority == priority) && |
b97bf3fd PL |
284 | (++with_this_prio > 2)) { |
285 | if (priority-- == 0) { | |
2cf8aa19 EH |
286 | pr_warn("Bearer <%s> rejected, duplicate priority\n", |
287 | name); | |
7216cd94 | 288 | return -EINVAL; |
b97bf3fd | 289 | } |
2cf8aa19 EH |
290 | pr_warn("Bearer <%s> priority adjustment required %u->%u\n", |
291 | name, priority + 1, priority); | |
b97bf3fd PL |
292 | goto restart; |
293 | } | |
294 | } | |
295 | if (bearer_id >= MAX_BEARERS) { | |
2cf8aa19 EH |
296 | pr_warn("Bearer <%s> rejected, bearer limit reached (%u)\n", |
297 | name, MAX_BEARERS); | |
7216cd94 | 298 | return -EINVAL; |
b97bf3fd PL |
299 | } |
300 | ||
3874ccbb | 301 | b_ptr = kzalloc(sizeof(*b_ptr), GFP_ATOMIC); |
7216cd94 YX |
302 | if (!b_ptr) |
303 | return -ENOMEM; | |
304 | ||
2d627b92 | 305 | strcpy(b_ptr->name, name); |
e4d050cb | 306 | b_ptr->media = m_ptr; |
7f9f95d9 | 307 | res = m_ptr->enable_media(net, b_ptr); |
b97bf3fd | 308 | if (res) { |
2cf8aa19 EH |
309 | pr_warn("Bearer <%s> rejected, enable failure (%d)\n", |
310 | name, -res); | |
7216cd94 | 311 | return -EINVAL; |
b97bf3fd PL |
312 | } |
313 | ||
314 | b_ptr->identity = bearer_id; | |
5c216e1d AS |
315 | b_ptr->tolerance = m_ptr->tolerance; |
316 | b_ptr->window = m_ptr->window; | |
a21a584d | 317 | b_ptr->domain = disc_domain; |
b97bf3fd | 318 | b_ptr->net_plane = bearer_id + 'A'; |
b97bf3fd | 319 | b_ptr->priority = priority; |
3a777ff8 | 320 | |
c93d3baa | 321 | res = tipc_disc_create(net, b_ptr, &b_ptr->bcast_addr); |
3a777ff8 | 322 | if (res) { |
f2f9800d | 323 | bearer_disable(net, b_ptr, false); |
2cf8aa19 EH |
324 | pr_warn("Bearer <%s> rejected, discovery object creation failed\n", |
325 | name); | |
7216cd94 | 326 | return -EINVAL; |
3a777ff8 | 327 | } |
3874ccbb | 328 | |
7f9f95d9 | 329 | rcu_assign_pointer(tn->bearer_list[bearer_id], b_ptr); |
3874ccbb | 330 | |
2cf8aa19 EH |
331 | pr_info("Enabled bearer <%s>, discovery domain %s, priority %u\n", |
332 | name, | |
333 | tipc_addr_string_fill(addr_string, disc_domain), priority); | |
b97bf3fd PL |
334 | return res; |
335 | } | |
336 | ||
337 | /** | |
512137ee | 338 | * tipc_reset_bearer - Reset all links established over this bearer |
b97bf3fd | 339 | */ |
c93d3baa | 340 | static int tipc_reset_bearer(struct net *net, struct tipc_bearer *b_ptr) |
b97bf3fd | 341 | { |
512137ee | 342 | pr_info("Resetting bearer <%s>\n", b_ptr->name); |
f2f9800d | 343 | tipc_link_reset_list(net, b_ptr->identity); |
c93d3baa | 344 | tipc_disc_reset(net, b_ptr); |
0e35fd5e | 345 | return 0; |
b97bf3fd PL |
346 | } |
347 | ||
348 | /** | |
617d3c7a | 349 | * bearer_disable |
c4307285 | 350 | * |
7216cd94 | 351 | * Note: This routine assumes caller holds RTNL lock. |
b97bf3fd | 352 | */ |
f2f9800d YX |
353 | static void bearer_disable(struct net *net, struct tipc_bearer *b_ptr, |
354 | bool shutting_down) | |
b97bf3fd | 355 | { |
7f9f95d9 | 356 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
3874ccbb YX |
357 | u32 i; |
358 | ||
2cf8aa19 | 359 | pr_info("Disabling bearer <%s>\n", b_ptr->name); |
4babbaa8 | 360 | b_ptr->media->disable_media(b_ptr); |
d4cca39d | 361 | |
f2f9800d | 362 | tipc_link_delete_list(net, b_ptr->identity, shutting_down); |
a8304529 YX |
363 | if (b_ptr->link_req) |
364 | tipc_disc_delete(b_ptr->link_req); | |
3874ccbb YX |
365 | |
366 | for (i = 0; i < MAX_BEARERS; i++) { | |
7f9f95d9 YX |
367 | if (b_ptr == rtnl_dereference(tn->bearer_list[i])) { |
368 | RCU_INIT_POINTER(tn->bearer_list[i], NULL); | |
3874ccbb YX |
369 | break; |
370 | } | |
371 | } | |
f8322dfc | 372 | kfree_rcu(b_ptr, rcu); |
b97bf3fd PL |
373 | } |
374 | ||
7f9f95d9 | 375 | int tipc_enable_l2_media(struct net *net, struct tipc_bearer *b) |
e4d050cb YX |
376 | { |
377 | struct net_device *dev; | |
378 | char *driver_name = strchr((const char *)b->name, ':') + 1; | |
379 | ||
380 | /* Find device with specified name */ | |
7f9f95d9 | 381 | dev = dev_get_by_name(net, driver_name); |
e4d050cb YX |
382 | if (!dev) |
383 | return -ENODEV; | |
384 | ||
38504c28 | 385 | /* Associate TIPC bearer with L2 bearer */ |
2231c5af | 386 | rcu_assign_pointer(b->media_ptr, dev); |
38504c28 | 387 | memset(&b->bcast_addr, 0, sizeof(b->bcast_addr)); |
e4d050cb YX |
388 | memcpy(b->bcast_addr.value, dev->broadcast, b->media->hwaddr_len); |
389 | b->bcast_addr.media_id = b->media->type_id; | |
390 | b->bcast_addr.broadcast = 1; | |
391 | b->mtu = dev->mtu; | |
38504c28 | 392 | b->media->raw2addr(b, &b->addr, (char *)dev->dev_addr); |
e4d050cb YX |
393 | rcu_assign_pointer(dev->tipc_ptr, b); |
394 | return 0; | |
395 | } | |
396 | ||
38504c28 | 397 | /* tipc_disable_l2_media - detach TIPC bearer from an L2 interface |
e4d050cb | 398 | * |
38504c28 | 399 | * Mark L2 bearer as inactive so that incoming buffers are thrown away, |
e4d050cb YX |
400 | * then get worker thread to complete bearer cleanup. (Can't do cleanup |
401 | * here because cleanup code needs to sleep and caller holds spinlocks.) | |
402 | */ | |
403 | void tipc_disable_l2_media(struct tipc_bearer *b) | |
404 | { | |
2231c5af YX |
405 | struct net_device *dev; |
406 | ||
407 | dev = (struct net_device *)rtnl_dereference(b->media_ptr); | |
408 | RCU_INIT_POINTER(b->media_ptr, NULL); | |
e4d050cb | 409 | RCU_INIT_POINTER(dev->tipc_ptr, NULL); |
f1c8d8cb | 410 | synchronize_net(); |
e4d050cb YX |
411 | dev_put(dev); |
412 | } | |
413 | ||
414 | /** | |
38504c28 | 415 | * tipc_l2_send_msg - send a TIPC packet out over an L2 interface |
e4d050cb | 416 | * @buf: the packet to be sent |
963a1855 | 417 | * @b_ptr: the bearer through which the packet is to be sent |
e4d050cb YX |
418 | * @dest: peer destination address |
419 | */ | |
1da46568 YX |
420 | int tipc_l2_send_msg(struct net *net, struct sk_buff *buf, |
421 | struct tipc_bearer *b, struct tipc_media_addr *dest) | |
e4d050cb YX |
422 | { |
423 | struct sk_buff *clone; | |
2231c5af | 424 | struct net_device *dev; |
e4d050cb | 425 | int delta; |
2231c5af YX |
426 | |
427 | dev = (struct net_device *)rcu_dereference_rtnl(b->media_ptr); | |
428 | if (!dev) | |
429 | return 0; | |
e4d050cb YX |
430 | |
431 | clone = skb_clone(buf, GFP_ATOMIC); | |
432 | if (!clone) | |
433 | return 0; | |
434 | ||
435 | delta = dev->hard_header_len - skb_headroom(buf); | |
436 | if ((delta > 0) && | |
437 | pskb_expand_head(clone, SKB_DATA_ALIGN(delta), 0, GFP_ATOMIC)) { | |
438 | kfree_skb(clone); | |
439 | return 0; | |
440 | } | |
441 | ||
442 | skb_reset_network_header(clone); | |
443 | clone->dev = dev; | |
444 | clone->protocol = htons(ETH_P_TIPC); | |
445 | dev_hard_header(clone, dev, ETH_P_TIPC, dest->value, | |
446 | dev->dev_addr, clone->len); | |
447 | dev_queue_xmit(clone); | |
448 | return 0; | |
449 | } | |
450 | ||
451 | /* tipc_bearer_send- sends buffer to destination over bearer | |
452 | * | |
453 | * IMPORTANT: | |
454 | * The media send routine must not alter the buffer being passed in | |
455 | * as it may be needed for later retransmission! | |
456 | */ | |
7f9f95d9 | 457 | void tipc_bearer_send(struct net *net, u32 bearer_id, struct sk_buff *buf, |
e4d050cb YX |
458 | struct tipc_media_addr *dest) |
459 | { | |
7f9f95d9 | 460 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
7a2f7d18 YX |
461 | struct tipc_bearer *b_ptr; |
462 | ||
463 | rcu_read_lock(); | |
7f9f95d9 | 464 | b_ptr = rcu_dereference_rtnl(tn->bearer_list[bearer_id]); |
7a2f7d18 | 465 | if (likely(b_ptr)) |
1da46568 | 466 | b_ptr->media->send_msg(net, buf, b_ptr, dest); |
7a2f7d18 | 467 | rcu_read_unlock(); |
e4d050cb YX |
468 | } |
469 | ||
6e967adf YX |
470 | /** |
471 | * tipc_l2_rcv_msg - handle incoming TIPC message from an interface | |
472 | * @buf: the received packet | |
473 | * @dev: the net device that the packet was received on | |
474 | * @pt: the packet_type structure which was used to register this handler | |
475 | * @orig_dev: the original receive net device in case the device is a bond | |
476 | * | |
477 | * Accept only packets explicitly sent to this node, or broadcast packets; | |
478 | * ignores packets sent using interface multicast, and traffic sent to other | |
479 | * nodes (which can happen if interface is running in promiscuous mode). | |
480 | */ | |
481 | static int tipc_l2_rcv_msg(struct sk_buff *buf, struct net_device *dev, | |
482 | struct packet_type *pt, struct net_device *orig_dev) | |
483 | { | |
484 | struct tipc_bearer *b_ptr; | |
485 | ||
6e967adf | 486 | rcu_read_lock(); |
ca07fb07 | 487 | b_ptr = rcu_dereference_rtnl(dev->tipc_ptr); |
6e967adf YX |
488 | if (likely(b_ptr)) { |
489 | if (likely(buf->pkt_type <= PACKET_BROADCAST)) { | |
490 | buf->next = NULL; | |
c93d3baa | 491 | tipc_rcv(dev_net(dev), buf, b_ptr); |
6e967adf YX |
492 | rcu_read_unlock(); |
493 | return NET_RX_SUCCESS; | |
494 | } | |
495 | } | |
496 | rcu_read_unlock(); | |
497 | ||
498 | kfree_skb(buf); | |
499 | return NET_RX_DROP; | |
500 | } | |
501 | ||
502 | /** | |
503 | * tipc_l2_device_event - handle device events from network device | |
504 | * @nb: the context of the notification | |
505 | * @evt: the type of event | |
506 | * @ptr: the net device that the event was on | |
507 | * | |
508 | * This function is called by the Ethernet driver in case of link | |
509 | * change event. | |
510 | */ | |
511 | static int tipc_l2_device_event(struct notifier_block *nb, unsigned long evt, | |
512 | void *ptr) | |
513 | { | |
6e967adf | 514 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
c93d3baa YX |
515 | struct net *net = dev_net(dev); |
516 | struct tipc_bearer *b_ptr; | |
6e967adf | 517 | |
ca07fb07 YX |
518 | b_ptr = rtnl_dereference(dev->tipc_ptr); |
519 | if (!b_ptr) | |
6e967adf | 520 | return NOTIFY_DONE; |
6e967adf YX |
521 | |
522 | b_ptr->mtu = dev->mtu; | |
523 | ||
524 | switch (evt) { | |
525 | case NETDEV_CHANGE: | |
526 | if (netif_carrier_ok(dev)) | |
527 | break; | |
528 | case NETDEV_DOWN: | |
529 | case NETDEV_CHANGEMTU: | |
c93d3baa | 530 | tipc_reset_bearer(net, b_ptr); |
a21a584d | 531 | break; |
6e967adf | 532 | case NETDEV_CHANGEADDR: |
38504c28 | 533 | b_ptr->media->raw2addr(b_ptr, &b_ptr->addr, |
a21a584d | 534 | (char *)dev->dev_addr); |
c93d3baa | 535 | tipc_reset_bearer(net, b_ptr); |
6e967adf YX |
536 | break; |
537 | case NETDEV_UNREGISTER: | |
538 | case NETDEV_CHANGENAME: | |
f2f9800d | 539 | bearer_disable(dev_net(dev), b_ptr, false); |
6e967adf YX |
540 | break; |
541 | } | |
6e967adf YX |
542 | return NOTIFY_OK; |
543 | } | |
544 | ||
545 | static struct packet_type tipc_packet_type __read_mostly = { | |
184593c7 | 546 | .type = htons(ETH_P_TIPC), |
6e967adf YX |
547 | .func = tipc_l2_rcv_msg, |
548 | }; | |
549 | ||
550 | static struct notifier_block notifier = { | |
551 | .notifier_call = tipc_l2_device_event, | |
552 | .priority = 0, | |
553 | }; | |
554 | ||
555 | int tipc_bearer_setup(void) | |
556 | { | |
970122fd YX |
557 | int err; |
558 | ||
559 | err = register_netdevice_notifier(¬ifier); | |
560 | if (err) | |
561 | return err; | |
6e967adf | 562 | dev_add_pack(&tipc_packet_type); |
970122fd | 563 | return 0; |
6e967adf YX |
564 | } |
565 | ||
566 | void tipc_bearer_cleanup(void) | |
567 | { | |
568 | unregister_netdevice_notifier(¬ifier); | |
569 | dev_remove_pack(&tipc_packet_type); | |
570 | } | |
b97bf3fd | 571 | |
f2f9800d | 572 | void tipc_bearer_stop(struct net *net) |
b97bf3fd | 573 | { |
7f9f95d9 | 574 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
3874ccbb | 575 | struct tipc_bearer *b_ptr; |
b97bf3fd PL |
576 | u32 i; |
577 | ||
b97bf3fd | 578 | for (i = 0; i < MAX_BEARERS; i++) { |
7f9f95d9 | 579 | b_ptr = rtnl_dereference(tn->bearer_list[i]); |
f47de12b | 580 | if (b_ptr) { |
f2f9800d | 581 | bearer_disable(net, b_ptr, true); |
7f9f95d9 | 582 | tn->bearer_list[i] = NULL; |
3874ccbb | 583 | } |
b97bf3fd | 584 | } |
b97bf3fd | 585 | } |
0655f6a8 | 586 | |
35b9dd76 | 587 | /* Caller should hold rtnl_lock to protect the bearer */ |
d8182804 RA |
588 | static int __tipc_nl_add_bearer(struct tipc_nl_msg *msg, |
589 | struct tipc_bearer *bearer) | |
35b9dd76 RA |
590 | { |
591 | void *hdr; | |
592 | struct nlattr *attrs; | |
593 | struct nlattr *prop; | |
594 | ||
bfb3e5dd | 595 | hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family, |
35b9dd76 RA |
596 | NLM_F_MULTI, TIPC_NL_BEARER_GET); |
597 | if (!hdr) | |
598 | return -EMSGSIZE; | |
599 | ||
600 | attrs = nla_nest_start(msg->skb, TIPC_NLA_BEARER); | |
601 | if (!attrs) | |
602 | goto msg_full; | |
603 | ||
604 | if (nla_put_string(msg->skb, TIPC_NLA_BEARER_NAME, bearer->name)) | |
605 | goto attr_msg_full; | |
606 | ||
607 | prop = nla_nest_start(msg->skb, TIPC_NLA_BEARER_PROP); | |
608 | if (!prop) | |
609 | goto prop_msg_full; | |
610 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, bearer->priority)) | |
611 | goto prop_msg_full; | |
612 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, bearer->tolerance)) | |
613 | goto prop_msg_full; | |
614 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, bearer->window)) | |
615 | goto prop_msg_full; | |
616 | ||
617 | nla_nest_end(msg->skb, prop); | |
618 | nla_nest_end(msg->skb, attrs); | |
619 | genlmsg_end(msg->skb, hdr); | |
620 | ||
621 | return 0; | |
622 | ||
623 | prop_msg_full: | |
624 | nla_nest_cancel(msg->skb, prop); | |
625 | attr_msg_full: | |
626 | nla_nest_cancel(msg->skb, attrs); | |
627 | msg_full: | |
628 | genlmsg_cancel(msg->skb, hdr); | |
629 | ||
630 | return -EMSGSIZE; | |
631 | } | |
632 | ||
633 | int tipc_nl_bearer_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
634 | { | |
635 | int err; | |
636 | int i = cb->args[0]; | |
637 | struct tipc_bearer *bearer; | |
638 | struct tipc_nl_msg msg; | |
7f9f95d9 YX |
639 | struct net *net = sock_net(skb->sk); |
640 | struct tipc_net *tn = net_generic(net, tipc_net_id); | |
35b9dd76 RA |
641 | |
642 | if (i == MAX_BEARERS) | |
643 | return 0; | |
644 | ||
645 | msg.skb = skb; | |
646 | msg.portid = NETLINK_CB(cb->skb).portid; | |
647 | msg.seq = cb->nlh->nlmsg_seq; | |
648 | ||
649 | rtnl_lock(); | |
650 | for (i = 0; i < MAX_BEARERS; i++) { | |
7f9f95d9 | 651 | bearer = rtnl_dereference(tn->bearer_list[i]); |
35b9dd76 RA |
652 | if (!bearer) |
653 | continue; | |
654 | ||
655 | err = __tipc_nl_add_bearer(&msg, bearer); | |
656 | if (err) | |
657 | break; | |
658 | } | |
659 | rtnl_unlock(); | |
660 | ||
661 | cb->args[0] = i; | |
662 | return skb->len; | |
663 | } | |
664 | ||
665 | int tipc_nl_bearer_get(struct sk_buff *skb, struct genl_info *info) | |
666 | { | |
667 | int err; | |
668 | char *name; | |
669 | struct sk_buff *rep; | |
670 | struct tipc_bearer *bearer; | |
671 | struct tipc_nl_msg msg; | |
672 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
7f9f95d9 | 673 | struct net *net = genl_info_net(info); |
35b9dd76 RA |
674 | |
675 | if (!info->attrs[TIPC_NLA_BEARER]) | |
676 | return -EINVAL; | |
677 | ||
678 | err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX, | |
679 | info->attrs[TIPC_NLA_BEARER], | |
680 | tipc_nl_bearer_policy); | |
681 | if (err) | |
682 | return err; | |
683 | ||
684 | if (!attrs[TIPC_NLA_BEARER_NAME]) | |
685 | return -EINVAL; | |
686 | name = nla_data(attrs[TIPC_NLA_BEARER_NAME]); | |
687 | ||
688 | rep = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); | |
689 | if (!rep) | |
690 | return -ENOMEM; | |
691 | ||
692 | msg.skb = rep; | |
693 | msg.portid = info->snd_portid; | |
694 | msg.seq = info->snd_seq; | |
695 | ||
696 | rtnl_lock(); | |
7f9f95d9 | 697 | bearer = tipc_bearer_find(net, name); |
35b9dd76 RA |
698 | if (!bearer) { |
699 | err = -EINVAL; | |
700 | goto err_out; | |
701 | } | |
702 | ||
703 | err = __tipc_nl_add_bearer(&msg, bearer); | |
704 | if (err) | |
705 | goto err_out; | |
706 | rtnl_unlock(); | |
707 | ||
708 | return genlmsg_reply(rep, info); | |
709 | err_out: | |
710 | rtnl_unlock(); | |
711 | nlmsg_free(rep); | |
712 | ||
713 | return err; | |
714 | } | |
715 | ||
0655f6a8 RA |
716 | int tipc_nl_bearer_disable(struct sk_buff *skb, struct genl_info *info) |
717 | { | |
718 | int err; | |
719 | char *name; | |
720 | struct tipc_bearer *bearer; | |
721 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
9ab15465 | 722 | struct net *net = sock_net(skb->sk); |
0655f6a8 RA |
723 | |
724 | if (!info->attrs[TIPC_NLA_BEARER]) | |
725 | return -EINVAL; | |
726 | ||
727 | err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX, | |
728 | info->attrs[TIPC_NLA_BEARER], | |
729 | tipc_nl_bearer_policy); | |
730 | if (err) | |
731 | return err; | |
732 | ||
733 | if (!attrs[TIPC_NLA_BEARER_NAME]) | |
734 | return -EINVAL; | |
735 | ||
736 | name = nla_data(attrs[TIPC_NLA_BEARER_NAME]); | |
737 | ||
738 | rtnl_lock(); | |
7f9f95d9 | 739 | bearer = tipc_bearer_find(net, name); |
0655f6a8 RA |
740 | if (!bearer) { |
741 | rtnl_unlock(); | |
742 | return -EINVAL; | |
743 | } | |
744 | ||
afaa3f65 | 745 | bearer_disable(net, bearer, true); |
0655f6a8 RA |
746 | rtnl_unlock(); |
747 | ||
748 | return 0; | |
749 | } | |
750 | ||
751 | int tipc_nl_bearer_enable(struct sk_buff *skb, struct genl_info *info) | |
752 | { | |
753 | int err; | |
754 | char *bearer; | |
755 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
9ab15465 RA |
756 | struct net *net = sock_net(skb->sk); |
757 | struct tipc_net *tn = net_generic(net, tipc_net_id); | |
0655f6a8 RA |
758 | u32 domain; |
759 | u32 prio; | |
760 | ||
761 | prio = TIPC_MEDIA_LINK_PRI; | |
34747539 | 762 | domain = tn->own_addr & TIPC_CLUSTER_MASK; |
0655f6a8 RA |
763 | |
764 | if (!info->attrs[TIPC_NLA_BEARER]) | |
765 | return -EINVAL; | |
766 | ||
767 | err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX, | |
768 | info->attrs[TIPC_NLA_BEARER], | |
769 | tipc_nl_bearer_policy); | |
770 | if (err) | |
771 | return err; | |
772 | ||
773 | if (!attrs[TIPC_NLA_BEARER_NAME]) | |
774 | return -EINVAL; | |
775 | ||
776 | bearer = nla_data(attrs[TIPC_NLA_BEARER_NAME]); | |
777 | ||
778 | if (attrs[TIPC_NLA_BEARER_DOMAIN]) | |
779 | domain = nla_get_u32(attrs[TIPC_NLA_BEARER_DOMAIN]); | |
780 | ||
781 | if (attrs[TIPC_NLA_BEARER_PROP]) { | |
782 | struct nlattr *props[TIPC_NLA_PROP_MAX + 1]; | |
783 | ||
784 | err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_BEARER_PROP], | |
785 | props); | |
786 | if (err) | |
787 | return err; | |
788 | ||
789 | if (props[TIPC_NLA_PROP_PRIO]) | |
790 | prio = nla_get_u32(props[TIPC_NLA_PROP_PRIO]); | |
791 | } | |
792 | ||
793 | rtnl_lock(); | |
c93d3baa | 794 | err = tipc_enable_bearer(net, bearer, domain, prio); |
0655f6a8 RA |
795 | if (err) { |
796 | rtnl_unlock(); | |
797 | return err; | |
798 | } | |
799 | rtnl_unlock(); | |
800 | ||
801 | return 0; | |
802 | } | |
315c00bc RA |
803 | |
804 | int tipc_nl_bearer_set(struct sk_buff *skb, struct genl_info *info) | |
805 | { | |
806 | int err; | |
807 | char *name; | |
808 | struct tipc_bearer *b; | |
809 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
7f9f95d9 | 810 | struct net *net = genl_info_net(info); |
315c00bc RA |
811 | |
812 | if (!info->attrs[TIPC_NLA_BEARER]) | |
813 | return -EINVAL; | |
814 | ||
815 | err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX, | |
816 | info->attrs[TIPC_NLA_BEARER], | |
817 | tipc_nl_bearer_policy); | |
818 | if (err) | |
819 | return err; | |
820 | ||
821 | if (!attrs[TIPC_NLA_BEARER_NAME]) | |
822 | return -EINVAL; | |
823 | name = nla_data(attrs[TIPC_NLA_BEARER_NAME]); | |
824 | ||
825 | rtnl_lock(); | |
7f9f95d9 | 826 | b = tipc_bearer_find(net, name); |
315c00bc RA |
827 | if (!b) { |
828 | rtnl_unlock(); | |
829 | return -EINVAL; | |
830 | } | |
831 | ||
832 | if (attrs[TIPC_NLA_BEARER_PROP]) { | |
833 | struct nlattr *props[TIPC_NLA_PROP_MAX + 1]; | |
834 | ||
835 | err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_BEARER_PROP], | |
836 | props); | |
837 | if (err) { | |
838 | rtnl_unlock(); | |
839 | return err; | |
840 | } | |
841 | ||
842 | if (props[TIPC_NLA_PROP_TOL]) | |
843 | b->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]); | |
844 | if (props[TIPC_NLA_PROP_PRIO]) | |
845 | b->priority = nla_get_u32(props[TIPC_NLA_PROP_PRIO]); | |
846 | if (props[TIPC_NLA_PROP_WIN]) | |
847 | b->window = nla_get_u32(props[TIPC_NLA_PROP_WIN]); | |
848 | } | |
849 | rtnl_unlock(); | |
850 | ||
851 | return 0; | |
852 | } | |
46f15c67 | 853 | |
d8182804 RA |
854 | static int __tipc_nl_add_media(struct tipc_nl_msg *msg, |
855 | struct tipc_media *media) | |
46f15c67 RA |
856 | { |
857 | void *hdr; | |
858 | struct nlattr *attrs; | |
859 | struct nlattr *prop; | |
860 | ||
bfb3e5dd | 861 | hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family, |
46f15c67 RA |
862 | NLM_F_MULTI, TIPC_NL_MEDIA_GET); |
863 | if (!hdr) | |
864 | return -EMSGSIZE; | |
865 | ||
866 | attrs = nla_nest_start(msg->skb, TIPC_NLA_MEDIA); | |
867 | if (!attrs) | |
868 | goto msg_full; | |
869 | ||
870 | if (nla_put_string(msg->skb, TIPC_NLA_MEDIA_NAME, media->name)) | |
871 | goto attr_msg_full; | |
872 | ||
873 | prop = nla_nest_start(msg->skb, TIPC_NLA_MEDIA_PROP); | |
874 | if (!prop) | |
875 | goto prop_msg_full; | |
876 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, media->priority)) | |
877 | goto prop_msg_full; | |
878 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, media->tolerance)) | |
879 | goto prop_msg_full; | |
880 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, media->window)) | |
881 | goto prop_msg_full; | |
882 | ||
883 | nla_nest_end(msg->skb, prop); | |
884 | nla_nest_end(msg->skb, attrs); | |
885 | genlmsg_end(msg->skb, hdr); | |
886 | ||
887 | return 0; | |
888 | ||
889 | prop_msg_full: | |
890 | nla_nest_cancel(msg->skb, prop); | |
891 | attr_msg_full: | |
892 | nla_nest_cancel(msg->skb, attrs); | |
893 | msg_full: | |
894 | genlmsg_cancel(msg->skb, hdr); | |
895 | ||
896 | return -EMSGSIZE; | |
897 | } | |
898 | ||
899 | int tipc_nl_media_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
900 | { | |
901 | int err; | |
902 | int i = cb->args[0]; | |
903 | struct tipc_nl_msg msg; | |
904 | ||
905 | if (i == MAX_MEDIA) | |
906 | return 0; | |
907 | ||
908 | msg.skb = skb; | |
909 | msg.portid = NETLINK_CB(cb->skb).portid; | |
910 | msg.seq = cb->nlh->nlmsg_seq; | |
911 | ||
912 | rtnl_lock(); | |
913 | for (; media_info_array[i] != NULL; i++) { | |
914 | err = __tipc_nl_add_media(&msg, media_info_array[i]); | |
915 | if (err) | |
916 | break; | |
917 | } | |
918 | rtnl_unlock(); | |
919 | ||
920 | cb->args[0] = i; | |
921 | return skb->len; | |
922 | } | |
923 | ||
924 | int tipc_nl_media_get(struct sk_buff *skb, struct genl_info *info) | |
925 | { | |
926 | int err; | |
927 | char *name; | |
928 | struct tipc_nl_msg msg; | |
929 | struct tipc_media *media; | |
930 | struct sk_buff *rep; | |
931 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
932 | ||
933 | if (!info->attrs[TIPC_NLA_MEDIA]) | |
934 | return -EINVAL; | |
935 | ||
936 | err = nla_parse_nested(attrs, TIPC_NLA_MEDIA_MAX, | |
937 | info->attrs[TIPC_NLA_MEDIA], | |
938 | tipc_nl_media_policy); | |
939 | if (err) | |
940 | return err; | |
941 | ||
942 | if (!attrs[TIPC_NLA_MEDIA_NAME]) | |
943 | return -EINVAL; | |
944 | name = nla_data(attrs[TIPC_NLA_MEDIA_NAME]); | |
945 | ||
946 | rep = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); | |
947 | if (!rep) | |
948 | return -ENOMEM; | |
949 | ||
950 | msg.skb = rep; | |
951 | msg.portid = info->snd_portid; | |
952 | msg.seq = info->snd_seq; | |
953 | ||
954 | rtnl_lock(); | |
955 | media = tipc_media_find(name); | |
956 | if (!media) { | |
957 | err = -EINVAL; | |
958 | goto err_out; | |
959 | } | |
960 | ||
961 | err = __tipc_nl_add_media(&msg, media); | |
962 | if (err) | |
963 | goto err_out; | |
964 | rtnl_unlock(); | |
965 | ||
966 | return genlmsg_reply(rep, info); | |
967 | err_out: | |
968 | rtnl_unlock(); | |
969 | nlmsg_free(rep); | |
970 | ||
971 | return err; | |
972 | } | |
1e55417d RA |
973 | |
974 | int tipc_nl_media_set(struct sk_buff *skb, struct genl_info *info) | |
975 | { | |
976 | int err; | |
977 | char *name; | |
978 | struct tipc_media *m; | |
979 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
980 | ||
981 | if (!info->attrs[TIPC_NLA_MEDIA]) | |
982 | return -EINVAL; | |
983 | ||
984 | err = nla_parse_nested(attrs, TIPC_NLA_MEDIA_MAX, | |
985 | info->attrs[TIPC_NLA_MEDIA], | |
986 | tipc_nl_media_policy); | |
987 | ||
988 | if (!attrs[TIPC_NLA_MEDIA_NAME]) | |
989 | return -EINVAL; | |
990 | name = nla_data(attrs[TIPC_NLA_MEDIA_NAME]); | |
991 | ||
992 | rtnl_lock(); | |
993 | m = tipc_media_find(name); | |
994 | if (!m) { | |
995 | rtnl_unlock(); | |
996 | return -EINVAL; | |
997 | } | |
998 | ||
999 | if (attrs[TIPC_NLA_MEDIA_PROP]) { | |
1000 | struct nlattr *props[TIPC_NLA_PROP_MAX + 1]; | |
1001 | ||
1002 | err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_MEDIA_PROP], | |
1003 | props); | |
1004 | if (err) { | |
1005 | rtnl_unlock(); | |
1006 | return err; | |
1007 | } | |
1008 | ||
1009 | if (props[TIPC_NLA_PROP_TOL]) | |
1010 | m->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]); | |
1011 | if (props[TIPC_NLA_PROP_PRIO]) | |
1012 | m->priority = nla_get_u32(props[TIPC_NLA_PROP_PRIO]); | |
1013 | if (props[TIPC_NLA_PROP_WIN]) | |
1014 | m->window = nla_get_u32(props[TIPC_NLA_PROP_WIN]); | |
1015 | } | |
1016 | rtnl_unlock(); | |
1017 | ||
1018 | return 0; | |
1019 | } |