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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 | ||
37 | #include "core.h" | |
38 | #include "config.h" | |
b97bf3fd | 39 | #include "bearer.h" |
0655f6a8 | 40 | #include "link.h" |
b97bf3fd | 41 | #include "discover.h" |
b97bf3fd | 42 | |
a29a194a | 43 | #define MAX_ADDR_STR 60 |
b97bf3fd | 44 | |
ef72a7e0 | 45 | static struct tipc_media * const media_info_array[] = { |
5702dbab JPM |
46 | ð_media_info, |
47 | #ifdef CONFIG_TIPC_MEDIA_IB | |
48 | &ib_media_info, | |
49 | #endif | |
50 | NULL | |
51 | }; | |
b97bf3fd | 52 | |
0655f6a8 RA |
53 | static const struct nla_policy |
54 | tipc_nl_bearer_policy[TIPC_NLA_BEARER_MAX + 1] = { | |
55 | [TIPC_NLA_BEARER_UNSPEC] = { .type = NLA_UNSPEC }, | |
56 | [TIPC_NLA_BEARER_NAME] = { | |
57 | .type = NLA_STRING, | |
58 | .len = TIPC_MAX_BEARER_NAME | |
59 | }, | |
60 | [TIPC_NLA_BEARER_PROP] = { .type = NLA_NESTED }, | |
61 | [TIPC_NLA_BEARER_DOMAIN] = { .type = NLA_U32 } | |
62 | }; | |
63 | ||
46f15c67 RA |
64 | static const struct nla_policy tipc_nl_media_policy[TIPC_NLA_MEDIA_MAX + 1] = { |
65 | [TIPC_NLA_MEDIA_UNSPEC] = { .type = NLA_UNSPEC }, | |
66 | [TIPC_NLA_MEDIA_NAME] = { .type = NLA_STRING }, | |
67 | [TIPC_NLA_MEDIA_PROP] = { .type = NLA_NESTED } | |
68 | }; | |
69 | ||
f8322dfc | 70 | struct tipc_bearer __rcu *bearer_list[MAX_BEARERS + 1]; |
b97bf3fd | 71 | |
7d33939f | 72 | static void bearer_disable(struct tipc_bearer *b_ptr, 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))) |
dc1aed37 | 114 | ret = tipc_snprintf(buf, len, "%s(%s)", m_ptr->name, addr_str); |
c61b666e | 115 | else { |
c61b666e | 116 | u32 i; |
b97bf3fd | 117 | |
dc1aed37 | 118 | ret = tipc_snprintf(buf, len, "UNKNOWN(%u)", a->media_id); |
3d749a6a | 119 | for (i = 0; i < sizeof(a->value); i++) |
dc1aed37 EH |
120 | ret += tipc_snprintf(buf - ret, len + ret, |
121 | "-%02x", a->value[i]); | |
b97bf3fd PL |
122 | } |
123 | } | |
124 | ||
125 | /** | |
4323add6 | 126 | * tipc_media_get_names - record names of registered media in buffer |
b97bf3fd | 127 | */ |
4323add6 | 128 | struct sk_buff *tipc_media_get_names(void) |
b97bf3fd PL |
129 | { |
130 | struct sk_buff *buf; | |
b97bf3fd PL |
131 | int i; |
132 | ||
4323add6 | 133 | buf = tipc_cfg_reply_alloc(MAX_MEDIA * TLV_SPACE(TIPC_MAX_MEDIA_NAME)); |
b97bf3fd PL |
134 | if (!buf) |
135 | return NULL; | |
136 | ||
ef72a7e0 | 137 | for (i = 0; media_info_array[i] != NULL; i++) { |
a31abe8d | 138 | tipc_cfg_append_tlv(buf, TIPC_TLV_MEDIA_NAME, |
ef72a7e0 JPM |
139 | media_info_array[i]->name, |
140 | strlen(media_info_array[i]->name) + 1); | |
b97bf3fd | 141 | } |
b97bf3fd PL |
142 | return buf; |
143 | } | |
144 | ||
145 | /** | |
146 | * bearer_name_validate - validate & (optionally) deconstruct bearer name | |
2c53040f BH |
147 | * @name: ptr to bearer name string |
148 | * @name_parts: ptr to area for bearer name components (or NULL if not needed) | |
c4307285 | 149 | * |
b97bf3fd PL |
150 | * Returns 1 if bearer name is valid, otherwise 0. |
151 | */ | |
c4307285 | 152 | static int bearer_name_validate(const char *name, |
f19765f4 | 153 | struct tipc_bearer_names *name_parts) |
b97bf3fd PL |
154 | { |
155 | char name_copy[TIPC_MAX_BEARER_NAME]; | |
156 | char *media_name; | |
157 | char *if_name; | |
158 | u32 media_len; | |
159 | u32 if_len; | |
160 | ||
161 | /* copy bearer name & ensure length is OK */ | |
b97bf3fd PL |
162 | name_copy[TIPC_MAX_BEARER_NAME - 1] = 0; |
163 | /* need above in case non-Posix strncpy() doesn't pad with nulls */ | |
164 | strncpy(name_copy, name, TIPC_MAX_BEARER_NAME); | |
165 | if (name_copy[TIPC_MAX_BEARER_NAME - 1] != 0) | |
166 | return 0; | |
167 | ||
168 | /* ensure all component parts of bearer name are present */ | |
b97bf3fd | 169 | media_name = name_copy; |
2db9983a AS |
170 | if_name = strchr(media_name, ':'); |
171 | if (if_name == NULL) | |
b97bf3fd PL |
172 | return 0; |
173 | *(if_name++) = 0; | |
174 | media_len = if_name - media_name; | |
175 | if_len = strlen(if_name) + 1; | |
176 | ||
177 | /* validate component parts of bearer name */ | |
c4307285 | 178 | if ((media_len <= 1) || (media_len > TIPC_MAX_MEDIA_NAME) || |
fc073938 | 179 | (if_len <= 1) || (if_len > TIPC_MAX_IF_NAME)) |
b97bf3fd PL |
180 | return 0; |
181 | ||
182 | /* return bearer name components, if necessary */ | |
b97bf3fd PL |
183 | if (name_parts) { |
184 | strcpy(name_parts->media_name, media_name); | |
185 | strcpy(name_parts->if_name, if_name); | |
186 | } | |
187 | return 1; | |
188 | } | |
189 | ||
190 | /** | |
5c216e1d | 191 | * tipc_bearer_find - locates bearer object with matching bearer name |
b97bf3fd | 192 | */ |
5c216e1d | 193 | struct tipc_bearer *tipc_bearer_find(const char *name) |
b97bf3fd | 194 | { |
2d627b92 | 195 | struct tipc_bearer *b_ptr; |
b97bf3fd PL |
196 | u32 i; |
197 | ||
3874ccbb | 198 | for (i = 0; i < MAX_BEARERS; i++) { |
f8322dfc | 199 | b_ptr = rtnl_dereference(bearer_list[i]); |
f47de12b | 200 | if (b_ptr && (!strcmp(b_ptr->name, name))) |
b97bf3fd PL |
201 | return b_ptr; |
202 | } | |
1fc54d8f | 203 | return NULL; |
b97bf3fd PL |
204 | } |
205 | ||
206 | /** | |
4323add6 | 207 | * tipc_bearer_get_names - record names of bearers in buffer |
b97bf3fd | 208 | */ |
4323add6 | 209 | struct sk_buff *tipc_bearer_get_names(void) |
b97bf3fd PL |
210 | { |
211 | struct sk_buff *buf; | |
ef72a7e0 | 212 | struct tipc_bearer *b; |
b97bf3fd PL |
213 | int i, j; |
214 | ||
4323add6 | 215 | buf = tipc_cfg_reply_alloc(MAX_BEARERS * TLV_SPACE(TIPC_MAX_BEARER_NAME)); |
b97bf3fd PL |
216 | if (!buf) |
217 | return NULL; | |
218 | ||
ef72a7e0 | 219 | for (i = 0; media_info_array[i] != NULL; i++) { |
b97bf3fd | 220 | for (j = 0; j < MAX_BEARERS; j++) { |
f8322dfc | 221 | b = rtnl_dereference(bearer_list[j]); |
3874ccbb YX |
222 | if (!b) |
223 | continue; | |
f47de12b | 224 | if (b->media == media_info_array[i]) { |
c4307285 | 225 | tipc_cfg_append_tlv(buf, TIPC_TLV_BEARER_NAME, |
ef72a7e0 JPM |
226 | b->name, |
227 | strlen(b->name) + 1); | |
b97bf3fd PL |
228 | } |
229 | } | |
230 | } | |
b97bf3fd PL |
231 | return buf; |
232 | } | |
233 | ||
7a2f7d18 | 234 | void tipc_bearer_add_dest(u32 bearer_id, u32 dest) |
b97bf3fd | 235 | { |
7a2f7d18 YX |
236 | struct tipc_bearer *b_ptr; |
237 | ||
238 | rcu_read_lock(); | |
239 | b_ptr = rcu_dereference_rtnl(bearer_list[bearer_id]); | |
240 | if (b_ptr) { | |
28dd9418 | 241 | tipc_bcbearer_sort(&b_ptr->nodes, dest, true); |
7a2f7d18 YX |
242 | tipc_disc_add_dest(b_ptr->link_req); |
243 | } | |
244 | rcu_read_unlock(); | |
b97bf3fd PL |
245 | } |
246 | ||
7a2f7d18 | 247 | void tipc_bearer_remove_dest(u32 bearer_id, u32 dest) |
b97bf3fd | 248 | { |
7a2f7d18 YX |
249 | struct tipc_bearer *b_ptr; |
250 | ||
251 | rcu_read_lock(); | |
252 | b_ptr = rcu_dereference_rtnl(bearer_list[bearer_id]); | |
253 | if (b_ptr) { | |
28dd9418 | 254 | tipc_bcbearer_sort(&b_ptr->nodes, dest, false); |
7a2f7d18 YX |
255 | tipc_disc_remove_dest(b_ptr->link_req); |
256 | } | |
257 | rcu_read_unlock(); | |
b97bf3fd PL |
258 | } |
259 | ||
b97bf3fd PL |
260 | /** |
261 | * tipc_enable_bearer - enable bearer with the given name | |
c4307285 | 262 | */ |
c93d3baa YX |
263 | int tipc_enable_bearer(struct net *net, const char *name, u32 disc_domain, |
264 | u32 priority) | |
b97bf3fd | 265 | { |
2d627b92 | 266 | struct tipc_bearer *b_ptr; |
358a0d1c | 267 | struct tipc_media *m_ptr; |
f19765f4 | 268 | struct tipc_bearer_names b_names; |
b97bf3fd PL |
269 | char addr_string[16]; |
270 | u32 bearer_id; | |
271 | u32 with_this_prio; | |
272 | u32 i; | |
273 | int res = -EINVAL; | |
274 | ||
b58343f9 | 275 | if (!tipc_own_addr) { |
2cf8aa19 EH |
276 | pr_warn("Bearer <%s> rejected, not supported in standalone mode\n", |
277 | name); | |
b97bf3fd | 278 | return -ENOPROTOOPT; |
a10bd924 | 279 | } |
f19765f4 | 280 | if (!bearer_name_validate(name, &b_names)) { |
2cf8aa19 | 281 | pr_warn("Bearer <%s> rejected, illegal name\n", name); |
16cb4b33 | 282 | return -EINVAL; |
a10bd924 | 283 | } |
66e019a6 AS |
284 | if (tipc_addr_domain_valid(disc_domain) && |
285 | (disc_domain != tipc_own_addr)) { | |
286 | if (tipc_in_scope(disc_domain, tipc_own_addr)) { | |
287 | disc_domain = tipc_own_addr & TIPC_CLUSTER_MASK; | |
288 | res = 0; /* accept any node in own cluster */ | |
336ebf5b | 289 | } else if (in_own_cluster_exact(disc_domain)) |
66e019a6 AS |
290 | res = 0; /* accept specified node in own cluster */ |
291 | } | |
292 | if (res) { | |
2cf8aa19 EH |
293 | pr_warn("Bearer <%s> rejected, illegal discovery domain\n", |
294 | name); | |
a10bd924 AS |
295 | return -EINVAL; |
296 | } | |
9efde4a0 | 297 | if ((priority > TIPC_MAX_LINK_PRI) && |
a10bd924 | 298 | (priority != TIPC_MEDIA_LINK_PRI)) { |
2cf8aa19 | 299 | pr_warn("Bearer <%s> rejected, illegal priority\n", name); |
b97bf3fd | 300 | return -EINVAL; |
a10bd924 | 301 | } |
b97bf3fd | 302 | |
f19765f4 | 303 | m_ptr = tipc_media_find(b_names.media_name); |
b97bf3fd | 304 | if (!m_ptr) { |
2cf8aa19 EH |
305 | pr_warn("Bearer <%s> rejected, media <%s> not registered\n", |
306 | name, b_names.media_name); | |
7216cd94 | 307 | return -EINVAL; |
b97bf3fd | 308 | } |
16cb4b33 PL |
309 | |
310 | if (priority == TIPC_MEDIA_LINK_PRI) | |
b97bf3fd PL |
311 | priority = m_ptr->priority; |
312 | ||
313 | restart: | |
314 | bearer_id = MAX_BEARERS; | |
315 | with_this_prio = 1; | |
316 | for (i = MAX_BEARERS; i-- != 0; ) { | |
f8322dfc | 317 | b_ptr = rtnl_dereference(bearer_list[i]); |
f47de12b | 318 | if (!b_ptr) { |
b97bf3fd PL |
319 | bearer_id = i; |
320 | continue; | |
321 | } | |
3874ccbb | 322 | if (!strcmp(name, b_ptr->name)) { |
2cf8aa19 EH |
323 | pr_warn("Bearer <%s> rejected, already enabled\n", |
324 | name); | |
7216cd94 | 325 | return -EINVAL; |
b97bf3fd | 326 | } |
3874ccbb | 327 | if ((b_ptr->priority == priority) && |
b97bf3fd PL |
328 | (++with_this_prio > 2)) { |
329 | if (priority-- == 0) { | |
2cf8aa19 EH |
330 | pr_warn("Bearer <%s> rejected, duplicate priority\n", |
331 | name); | |
7216cd94 | 332 | return -EINVAL; |
b97bf3fd | 333 | } |
2cf8aa19 EH |
334 | pr_warn("Bearer <%s> priority adjustment required %u->%u\n", |
335 | name, priority + 1, priority); | |
b97bf3fd PL |
336 | goto restart; |
337 | } | |
338 | } | |
339 | if (bearer_id >= MAX_BEARERS) { | |
2cf8aa19 EH |
340 | pr_warn("Bearer <%s> rejected, bearer limit reached (%u)\n", |
341 | name, MAX_BEARERS); | |
7216cd94 | 342 | return -EINVAL; |
b97bf3fd PL |
343 | } |
344 | ||
3874ccbb | 345 | b_ptr = kzalloc(sizeof(*b_ptr), GFP_ATOMIC); |
7216cd94 YX |
346 | if (!b_ptr) |
347 | return -ENOMEM; | |
348 | ||
2d627b92 | 349 | strcpy(b_ptr->name, name); |
e4d050cb | 350 | b_ptr->media = m_ptr; |
4babbaa8 | 351 | res = m_ptr->enable_media(b_ptr); |
b97bf3fd | 352 | if (res) { |
2cf8aa19 EH |
353 | pr_warn("Bearer <%s> rejected, enable failure (%d)\n", |
354 | name, -res); | |
7216cd94 | 355 | return -EINVAL; |
b97bf3fd PL |
356 | } |
357 | ||
358 | b_ptr->identity = bearer_id; | |
5c216e1d AS |
359 | b_ptr->tolerance = m_ptr->tolerance; |
360 | b_ptr->window = m_ptr->window; | |
a21a584d | 361 | b_ptr->domain = disc_domain; |
b97bf3fd | 362 | b_ptr->net_plane = bearer_id + 'A'; |
b97bf3fd | 363 | b_ptr->priority = priority; |
3a777ff8 | 364 | |
c93d3baa | 365 | res = tipc_disc_create(net, b_ptr, &b_ptr->bcast_addr); |
3a777ff8 | 366 | if (res) { |
7d33939f | 367 | bearer_disable(b_ptr, false); |
2cf8aa19 EH |
368 | pr_warn("Bearer <%s> rejected, discovery object creation failed\n", |
369 | name); | |
7216cd94 | 370 | return -EINVAL; |
3a777ff8 | 371 | } |
3874ccbb | 372 | |
f8322dfc | 373 | rcu_assign_pointer(bearer_list[bearer_id], b_ptr); |
3874ccbb | 374 | |
2cf8aa19 EH |
375 | pr_info("Enabled bearer <%s>, discovery domain %s, priority %u\n", |
376 | name, | |
377 | tipc_addr_string_fill(addr_string, disc_domain), priority); | |
b97bf3fd PL |
378 | return res; |
379 | } | |
380 | ||
381 | /** | |
512137ee | 382 | * tipc_reset_bearer - Reset all links established over this bearer |
b97bf3fd | 383 | */ |
c93d3baa | 384 | static int tipc_reset_bearer(struct net *net, struct tipc_bearer *b_ptr) |
b97bf3fd | 385 | { |
512137ee | 386 | pr_info("Resetting bearer <%s>\n", b_ptr->name); |
c61dd61d | 387 | tipc_link_reset_list(b_ptr->identity); |
c93d3baa | 388 | tipc_disc_reset(net, b_ptr); |
0e35fd5e | 389 | return 0; |
b97bf3fd PL |
390 | } |
391 | ||
392 | /** | |
617d3c7a | 393 | * bearer_disable |
c4307285 | 394 | * |
7216cd94 | 395 | * Note: This routine assumes caller holds RTNL lock. |
b97bf3fd | 396 | */ |
7d33939f | 397 | static void bearer_disable(struct tipc_bearer *b_ptr, bool shutting_down) |
b97bf3fd | 398 | { |
3874ccbb YX |
399 | u32 i; |
400 | ||
2cf8aa19 | 401 | pr_info("Disabling bearer <%s>\n", b_ptr->name); |
4babbaa8 | 402 | b_ptr->media->disable_media(b_ptr); |
d4cca39d | 403 | |
a8304529 YX |
404 | tipc_link_delete_list(b_ptr->identity, shutting_down); |
405 | if (b_ptr->link_req) | |
406 | tipc_disc_delete(b_ptr->link_req); | |
3874ccbb YX |
407 | |
408 | for (i = 0; i < MAX_BEARERS; i++) { | |
f8322dfc YX |
409 | if (b_ptr == rtnl_dereference(bearer_list[i])) { |
410 | RCU_INIT_POINTER(bearer_list[i], NULL); | |
3874ccbb YX |
411 | break; |
412 | } | |
413 | } | |
f8322dfc | 414 | kfree_rcu(b_ptr, rcu); |
b97bf3fd PL |
415 | } |
416 | ||
417 | int tipc_disable_bearer(const char *name) | |
418 | { | |
2d627b92 | 419 | struct tipc_bearer *b_ptr; |
b97bf3fd PL |
420 | int res; |
421 | ||
5c216e1d | 422 | b_ptr = tipc_bearer_find(name); |
ccc901ee | 423 | if (b_ptr == NULL) { |
2cf8aa19 | 424 | pr_warn("Attempt to disable unknown bearer <%s>\n", name); |
ccc901ee | 425 | res = -EINVAL; |
28cc937e | 426 | } else { |
7d33939f | 427 | bearer_disable(b_ptr, false); |
28cc937e AS |
428 | res = 0; |
429 | } | |
b97bf3fd PL |
430 | return res; |
431 | } | |
432 | ||
e4d050cb YX |
433 | int tipc_enable_l2_media(struct tipc_bearer *b) |
434 | { | |
435 | struct net_device *dev; | |
436 | char *driver_name = strchr((const char *)b->name, ':') + 1; | |
437 | ||
438 | /* Find device with specified name */ | |
439 | dev = dev_get_by_name(&init_net, driver_name); | |
440 | if (!dev) | |
441 | return -ENODEV; | |
442 | ||
38504c28 | 443 | /* Associate TIPC bearer with L2 bearer */ |
2231c5af | 444 | rcu_assign_pointer(b->media_ptr, dev); |
38504c28 | 445 | memset(&b->bcast_addr, 0, sizeof(b->bcast_addr)); |
e4d050cb YX |
446 | memcpy(b->bcast_addr.value, dev->broadcast, b->media->hwaddr_len); |
447 | b->bcast_addr.media_id = b->media->type_id; | |
448 | b->bcast_addr.broadcast = 1; | |
449 | b->mtu = dev->mtu; | |
38504c28 | 450 | b->media->raw2addr(b, &b->addr, (char *)dev->dev_addr); |
e4d050cb YX |
451 | rcu_assign_pointer(dev->tipc_ptr, b); |
452 | return 0; | |
453 | } | |
454 | ||
38504c28 | 455 | /* tipc_disable_l2_media - detach TIPC bearer from an L2 interface |
e4d050cb | 456 | * |
38504c28 | 457 | * Mark L2 bearer as inactive so that incoming buffers are thrown away, |
e4d050cb YX |
458 | * then get worker thread to complete bearer cleanup. (Can't do cleanup |
459 | * here because cleanup code needs to sleep and caller holds spinlocks.) | |
460 | */ | |
461 | void tipc_disable_l2_media(struct tipc_bearer *b) | |
462 | { | |
2231c5af YX |
463 | struct net_device *dev; |
464 | ||
465 | dev = (struct net_device *)rtnl_dereference(b->media_ptr); | |
466 | RCU_INIT_POINTER(b->media_ptr, NULL); | |
e4d050cb | 467 | RCU_INIT_POINTER(dev->tipc_ptr, NULL); |
f1c8d8cb | 468 | synchronize_net(); |
e4d050cb YX |
469 | dev_put(dev); |
470 | } | |
471 | ||
472 | /** | |
38504c28 | 473 | * tipc_l2_send_msg - send a TIPC packet out over an L2 interface |
e4d050cb | 474 | * @buf: the packet to be sent |
963a1855 | 475 | * @b_ptr: the bearer through which the packet is to be sent |
e4d050cb YX |
476 | * @dest: peer destination address |
477 | */ | |
478 | int tipc_l2_send_msg(struct sk_buff *buf, struct tipc_bearer *b, | |
479 | struct tipc_media_addr *dest) | |
480 | { | |
481 | struct sk_buff *clone; | |
2231c5af | 482 | struct net_device *dev; |
e4d050cb | 483 | int delta; |
2231c5af YX |
484 | |
485 | dev = (struct net_device *)rcu_dereference_rtnl(b->media_ptr); | |
486 | if (!dev) | |
487 | return 0; | |
e4d050cb YX |
488 | |
489 | clone = skb_clone(buf, GFP_ATOMIC); | |
490 | if (!clone) | |
491 | return 0; | |
492 | ||
493 | delta = dev->hard_header_len - skb_headroom(buf); | |
494 | if ((delta > 0) && | |
495 | pskb_expand_head(clone, SKB_DATA_ALIGN(delta), 0, GFP_ATOMIC)) { | |
496 | kfree_skb(clone); | |
497 | return 0; | |
498 | } | |
499 | ||
500 | skb_reset_network_header(clone); | |
501 | clone->dev = dev; | |
502 | clone->protocol = htons(ETH_P_TIPC); | |
503 | dev_hard_header(clone, dev, ETH_P_TIPC, dest->value, | |
504 | dev->dev_addr, clone->len); | |
505 | dev_queue_xmit(clone); | |
506 | return 0; | |
507 | } | |
508 | ||
509 | /* tipc_bearer_send- sends buffer to destination over bearer | |
510 | * | |
511 | * IMPORTANT: | |
512 | * The media send routine must not alter the buffer being passed in | |
513 | * as it may be needed for later retransmission! | |
514 | */ | |
7a2f7d18 | 515 | void tipc_bearer_send(u32 bearer_id, struct sk_buff *buf, |
e4d050cb YX |
516 | struct tipc_media_addr *dest) |
517 | { | |
7a2f7d18 YX |
518 | struct tipc_bearer *b_ptr; |
519 | ||
520 | rcu_read_lock(); | |
521 | b_ptr = rcu_dereference_rtnl(bearer_list[bearer_id]); | |
522 | if (likely(b_ptr)) | |
523 | b_ptr->media->send_msg(buf, b_ptr, dest); | |
524 | rcu_read_unlock(); | |
e4d050cb YX |
525 | } |
526 | ||
6e967adf YX |
527 | /** |
528 | * tipc_l2_rcv_msg - handle incoming TIPC message from an interface | |
529 | * @buf: the received packet | |
530 | * @dev: the net device that the packet was received on | |
531 | * @pt: the packet_type structure which was used to register this handler | |
532 | * @orig_dev: the original receive net device in case the device is a bond | |
533 | * | |
534 | * Accept only packets explicitly sent to this node, or broadcast packets; | |
535 | * ignores packets sent using interface multicast, and traffic sent to other | |
536 | * nodes (which can happen if interface is running in promiscuous mode). | |
537 | */ | |
538 | static int tipc_l2_rcv_msg(struct sk_buff *buf, struct net_device *dev, | |
539 | struct packet_type *pt, struct net_device *orig_dev) | |
540 | { | |
541 | struct tipc_bearer *b_ptr; | |
542 | ||
6e967adf | 543 | rcu_read_lock(); |
ca07fb07 | 544 | b_ptr = rcu_dereference_rtnl(dev->tipc_ptr); |
6e967adf YX |
545 | if (likely(b_ptr)) { |
546 | if (likely(buf->pkt_type <= PACKET_BROADCAST)) { | |
547 | buf->next = NULL; | |
c93d3baa | 548 | tipc_rcv(dev_net(dev), buf, b_ptr); |
6e967adf YX |
549 | rcu_read_unlock(); |
550 | return NET_RX_SUCCESS; | |
551 | } | |
552 | } | |
553 | rcu_read_unlock(); | |
554 | ||
555 | kfree_skb(buf); | |
556 | return NET_RX_DROP; | |
557 | } | |
558 | ||
559 | /** | |
560 | * tipc_l2_device_event - handle device events from network device | |
561 | * @nb: the context of the notification | |
562 | * @evt: the type of event | |
563 | * @ptr: the net device that the event was on | |
564 | * | |
565 | * This function is called by the Ethernet driver in case of link | |
566 | * change event. | |
567 | */ | |
568 | static int tipc_l2_device_event(struct notifier_block *nb, unsigned long evt, | |
569 | void *ptr) | |
570 | { | |
6e967adf | 571 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
c93d3baa YX |
572 | struct net *net = dev_net(dev); |
573 | struct tipc_bearer *b_ptr; | |
6e967adf | 574 | |
ca07fb07 YX |
575 | b_ptr = rtnl_dereference(dev->tipc_ptr); |
576 | if (!b_ptr) | |
6e967adf | 577 | return NOTIFY_DONE; |
6e967adf YX |
578 | |
579 | b_ptr->mtu = dev->mtu; | |
580 | ||
581 | switch (evt) { | |
582 | case NETDEV_CHANGE: | |
583 | if (netif_carrier_ok(dev)) | |
584 | break; | |
585 | case NETDEV_DOWN: | |
586 | case NETDEV_CHANGEMTU: | |
c93d3baa | 587 | tipc_reset_bearer(net, b_ptr); |
a21a584d | 588 | break; |
6e967adf | 589 | case NETDEV_CHANGEADDR: |
38504c28 | 590 | b_ptr->media->raw2addr(b_ptr, &b_ptr->addr, |
a21a584d | 591 | (char *)dev->dev_addr); |
c93d3baa | 592 | tipc_reset_bearer(net, b_ptr); |
6e967adf YX |
593 | break; |
594 | case NETDEV_UNREGISTER: | |
595 | case NETDEV_CHANGENAME: | |
4ae88c94 | 596 | bearer_disable(b_ptr, false); |
6e967adf YX |
597 | break; |
598 | } | |
6e967adf YX |
599 | return NOTIFY_OK; |
600 | } | |
601 | ||
602 | static struct packet_type tipc_packet_type __read_mostly = { | |
184593c7 | 603 | .type = htons(ETH_P_TIPC), |
6e967adf YX |
604 | .func = tipc_l2_rcv_msg, |
605 | }; | |
606 | ||
607 | static struct notifier_block notifier = { | |
608 | .notifier_call = tipc_l2_device_event, | |
609 | .priority = 0, | |
610 | }; | |
611 | ||
612 | int tipc_bearer_setup(void) | |
613 | { | |
970122fd YX |
614 | int err; |
615 | ||
616 | err = register_netdevice_notifier(¬ifier); | |
617 | if (err) | |
618 | return err; | |
6e967adf | 619 | dev_add_pack(&tipc_packet_type); |
970122fd | 620 | return 0; |
6e967adf YX |
621 | } |
622 | ||
623 | void tipc_bearer_cleanup(void) | |
624 | { | |
625 | unregister_netdevice_notifier(¬ifier); | |
626 | dev_remove_pack(&tipc_packet_type); | |
627 | } | |
b97bf3fd | 628 | |
4323add6 | 629 | void tipc_bearer_stop(void) |
b97bf3fd | 630 | { |
3874ccbb | 631 | struct tipc_bearer *b_ptr; |
b97bf3fd PL |
632 | u32 i; |
633 | ||
b97bf3fd | 634 | for (i = 0; i < MAX_BEARERS; i++) { |
f8322dfc | 635 | b_ptr = rtnl_dereference(bearer_list[i]); |
f47de12b | 636 | if (b_ptr) { |
3874ccbb YX |
637 | bearer_disable(b_ptr, true); |
638 | bearer_list[i] = NULL; | |
639 | } | |
b97bf3fd | 640 | } |
b97bf3fd | 641 | } |
0655f6a8 | 642 | |
35b9dd76 | 643 | /* Caller should hold rtnl_lock to protect the bearer */ |
d8182804 RA |
644 | static int __tipc_nl_add_bearer(struct tipc_nl_msg *msg, |
645 | struct tipc_bearer *bearer) | |
35b9dd76 RA |
646 | { |
647 | void *hdr; | |
648 | struct nlattr *attrs; | |
649 | struct nlattr *prop; | |
650 | ||
651 | hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_v2_family, | |
652 | NLM_F_MULTI, TIPC_NL_BEARER_GET); | |
653 | if (!hdr) | |
654 | return -EMSGSIZE; | |
655 | ||
656 | attrs = nla_nest_start(msg->skb, TIPC_NLA_BEARER); | |
657 | if (!attrs) | |
658 | goto msg_full; | |
659 | ||
660 | if (nla_put_string(msg->skb, TIPC_NLA_BEARER_NAME, bearer->name)) | |
661 | goto attr_msg_full; | |
662 | ||
663 | prop = nla_nest_start(msg->skb, TIPC_NLA_BEARER_PROP); | |
664 | if (!prop) | |
665 | goto prop_msg_full; | |
666 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, bearer->priority)) | |
667 | goto prop_msg_full; | |
668 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, bearer->tolerance)) | |
669 | goto prop_msg_full; | |
670 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, bearer->window)) | |
671 | goto prop_msg_full; | |
672 | ||
673 | nla_nest_end(msg->skb, prop); | |
674 | nla_nest_end(msg->skb, attrs); | |
675 | genlmsg_end(msg->skb, hdr); | |
676 | ||
677 | return 0; | |
678 | ||
679 | prop_msg_full: | |
680 | nla_nest_cancel(msg->skb, prop); | |
681 | attr_msg_full: | |
682 | nla_nest_cancel(msg->skb, attrs); | |
683 | msg_full: | |
684 | genlmsg_cancel(msg->skb, hdr); | |
685 | ||
686 | return -EMSGSIZE; | |
687 | } | |
688 | ||
689 | int tipc_nl_bearer_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
690 | { | |
691 | int err; | |
692 | int i = cb->args[0]; | |
693 | struct tipc_bearer *bearer; | |
694 | struct tipc_nl_msg msg; | |
695 | ||
696 | if (i == MAX_BEARERS) | |
697 | return 0; | |
698 | ||
699 | msg.skb = skb; | |
700 | msg.portid = NETLINK_CB(cb->skb).portid; | |
701 | msg.seq = cb->nlh->nlmsg_seq; | |
702 | ||
703 | rtnl_lock(); | |
704 | for (i = 0; i < MAX_BEARERS; i++) { | |
705 | bearer = rtnl_dereference(bearer_list[i]); | |
706 | if (!bearer) | |
707 | continue; | |
708 | ||
709 | err = __tipc_nl_add_bearer(&msg, bearer); | |
710 | if (err) | |
711 | break; | |
712 | } | |
713 | rtnl_unlock(); | |
714 | ||
715 | cb->args[0] = i; | |
716 | return skb->len; | |
717 | } | |
718 | ||
719 | int tipc_nl_bearer_get(struct sk_buff *skb, struct genl_info *info) | |
720 | { | |
721 | int err; | |
722 | char *name; | |
723 | struct sk_buff *rep; | |
724 | struct tipc_bearer *bearer; | |
725 | struct tipc_nl_msg msg; | |
726 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
727 | ||
728 | if (!info->attrs[TIPC_NLA_BEARER]) | |
729 | return -EINVAL; | |
730 | ||
731 | err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX, | |
732 | info->attrs[TIPC_NLA_BEARER], | |
733 | tipc_nl_bearer_policy); | |
734 | if (err) | |
735 | return err; | |
736 | ||
737 | if (!attrs[TIPC_NLA_BEARER_NAME]) | |
738 | return -EINVAL; | |
739 | name = nla_data(attrs[TIPC_NLA_BEARER_NAME]); | |
740 | ||
741 | rep = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); | |
742 | if (!rep) | |
743 | return -ENOMEM; | |
744 | ||
745 | msg.skb = rep; | |
746 | msg.portid = info->snd_portid; | |
747 | msg.seq = info->snd_seq; | |
748 | ||
749 | rtnl_lock(); | |
750 | bearer = tipc_bearer_find(name); | |
751 | if (!bearer) { | |
752 | err = -EINVAL; | |
753 | goto err_out; | |
754 | } | |
755 | ||
756 | err = __tipc_nl_add_bearer(&msg, bearer); | |
757 | if (err) | |
758 | goto err_out; | |
759 | rtnl_unlock(); | |
760 | ||
761 | return genlmsg_reply(rep, info); | |
762 | err_out: | |
763 | rtnl_unlock(); | |
764 | nlmsg_free(rep); | |
765 | ||
766 | return err; | |
767 | } | |
768 | ||
0655f6a8 RA |
769 | int tipc_nl_bearer_disable(struct sk_buff *skb, struct genl_info *info) |
770 | { | |
771 | int err; | |
772 | char *name; | |
773 | struct tipc_bearer *bearer; | |
774 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
775 | ||
776 | if (!info->attrs[TIPC_NLA_BEARER]) | |
777 | return -EINVAL; | |
778 | ||
779 | err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX, | |
780 | info->attrs[TIPC_NLA_BEARER], | |
781 | tipc_nl_bearer_policy); | |
782 | if (err) | |
783 | return err; | |
784 | ||
785 | if (!attrs[TIPC_NLA_BEARER_NAME]) | |
786 | return -EINVAL; | |
787 | ||
788 | name = nla_data(attrs[TIPC_NLA_BEARER_NAME]); | |
789 | ||
790 | rtnl_lock(); | |
791 | bearer = tipc_bearer_find(name); | |
792 | if (!bearer) { | |
793 | rtnl_unlock(); | |
794 | return -EINVAL; | |
795 | } | |
796 | ||
797 | bearer_disable(bearer, false); | |
798 | rtnl_unlock(); | |
799 | ||
800 | return 0; | |
801 | } | |
802 | ||
803 | int tipc_nl_bearer_enable(struct sk_buff *skb, struct genl_info *info) | |
804 | { | |
c93d3baa | 805 | struct net *net = genl_info_net(info); |
0655f6a8 RA |
806 | int err; |
807 | char *bearer; | |
808 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
809 | u32 domain; | |
810 | u32 prio; | |
811 | ||
812 | prio = TIPC_MEDIA_LINK_PRI; | |
813 | domain = tipc_own_addr & TIPC_CLUSTER_MASK; | |
814 | ||
815 | if (!info->attrs[TIPC_NLA_BEARER]) | |
816 | return -EINVAL; | |
817 | ||
818 | err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX, | |
819 | info->attrs[TIPC_NLA_BEARER], | |
820 | tipc_nl_bearer_policy); | |
821 | if (err) | |
822 | return err; | |
823 | ||
824 | if (!attrs[TIPC_NLA_BEARER_NAME]) | |
825 | return -EINVAL; | |
826 | ||
827 | bearer = nla_data(attrs[TIPC_NLA_BEARER_NAME]); | |
828 | ||
829 | if (attrs[TIPC_NLA_BEARER_DOMAIN]) | |
830 | domain = nla_get_u32(attrs[TIPC_NLA_BEARER_DOMAIN]); | |
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 | return err; | |
839 | ||
840 | if (props[TIPC_NLA_PROP_PRIO]) | |
841 | prio = nla_get_u32(props[TIPC_NLA_PROP_PRIO]); | |
842 | } | |
843 | ||
844 | rtnl_lock(); | |
c93d3baa | 845 | err = tipc_enable_bearer(net, bearer, domain, prio); |
0655f6a8 RA |
846 | if (err) { |
847 | rtnl_unlock(); | |
848 | return err; | |
849 | } | |
850 | rtnl_unlock(); | |
851 | ||
852 | return 0; | |
853 | } | |
315c00bc RA |
854 | |
855 | int tipc_nl_bearer_set(struct sk_buff *skb, struct genl_info *info) | |
856 | { | |
857 | int err; | |
858 | char *name; | |
859 | struct tipc_bearer *b; | |
860 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
861 | ||
862 | if (!info->attrs[TIPC_NLA_BEARER]) | |
863 | return -EINVAL; | |
864 | ||
865 | err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX, | |
866 | info->attrs[TIPC_NLA_BEARER], | |
867 | tipc_nl_bearer_policy); | |
868 | if (err) | |
869 | return err; | |
870 | ||
871 | if (!attrs[TIPC_NLA_BEARER_NAME]) | |
872 | return -EINVAL; | |
873 | name = nla_data(attrs[TIPC_NLA_BEARER_NAME]); | |
874 | ||
875 | rtnl_lock(); | |
876 | b = tipc_bearer_find(name); | |
877 | if (!b) { | |
878 | rtnl_unlock(); | |
879 | return -EINVAL; | |
880 | } | |
881 | ||
882 | if (attrs[TIPC_NLA_BEARER_PROP]) { | |
883 | struct nlattr *props[TIPC_NLA_PROP_MAX + 1]; | |
884 | ||
885 | err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_BEARER_PROP], | |
886 | props); | |
887 | if (err) { | |
888 | rtnl_unlock(); | |
889 | return err; | |
890 | } | |
891 | ||
892 | if (props[TIPC_NLA_PROP_TOL]) | |
893 | b->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]); | |
894 | if (props[TIPC_NLA_PROP_PRIO]) | |
895 | b->priority = nla_get_u32(props[TIPC_NLA_PROP_PRIO]); | |
896 | if (props[TIPC_NLA_PROP_WIN]) | |
897 | b->window = nla_get_u32(props[TIPC_NLA_PROP_WIN]); | |
898 | } | |
899 | rtnl_unlock(); | |
900 | ||
901 | return 0; | |
902 | } | |
46f15c67 | 903 | |
d8182804 RA |
904 | static int __tipc_nl_add_media(struct tipc_nl_msg *msg, |
905 | struct tipc_media *media) | |
46f15c67 RA |
906 | { |
907 | void *hdr; | |
908 | struct nlattr *attrs; | |
909 | struct nlattr *prop; | |
910 | ||
911 | hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_v2_family, | |
912 | NLM_F_MULTI, TIPC_NL_MEDIA_GET); | |
913 | if (!hdr) | |
914 | return -EMSGSIZE; | |
915 | ||
916 | attrs = nla_nest_start(msg->skb, TIPC_NLA_MEDIA); | |
917 | if (!attrs) | |
918 | goto msg_full; | |
919 | ||
920 | if (nla_put_string(msg->skb, TIPC_NLA_MEDIA_NAME, media->name)) | |
921 | goto attr_msg_full; | |
922 | ||
923 | prop = nla_nest_start(msg->skb, TIPC_NLA_MEDIA_PROP); | |
924 | if (!prop) | |
925 | goto prop_msg_full; | |
926 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, media->priority)) | |
927 | goto prop_msg_full; | |
928 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, media->tolerance)) | |
929 | goto prop_msg_full; | |
930 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, media->window)) | |
931 | goto prop_msg_full; | |
932 | ||
933 | nla_nest_end(msg->skb, prop); | |
934 | nla_nest_end(msg->skb, attrs); | |
935 | genlmsg_end(msg->skb, hdr); | |
936 | ||
937 | return 0; | |
938 | ||
939 | prop_msg_full: | |
940 | nla_nest_cancel(msg->skb, prop); | |
941 | attr_msg_full: | |
942 | nla_nest_cancel(msg->skb, attrs); | |
943 | msg_full: | |
944 | genlmsg_cancel(msg->skb, hdr); | |
945 | ||
946 | return -EMSGSIZE; | |
947 | } | |
948 | ||
949 | int tipc_nl_media_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
950 | { | |
951 | int err; | |
952 | int i = cb->args[0]; | |
953 | struct tipc_nl_msg msg; | |
954 | ||
955 | if (i == MAX_MEDIA) | |
956 | return 0; | |
957 | ||
958 | msg.skb = skb; | |
959 | msg.portid = NETLINK_CB(cb->skb).portid; | |
960 | msg.seq = cb->nlh->nlmsg_seq; | |
961 | ||
962 | rtnl_lock(); | |
963 | for (; media_info_array[i] != NULL; i++) { | |
964 | err = __tipc_nl_add_media(&msg, media_info_array[i]); | |
965 | if (err) | |
966 | break; | |
967 | } | |
968 | rtnl_unlock(); | |
969 | ||
970 | cb->args[0] = i; | |
971 | return skb->len; | |
972 | } | |
973 | ||
974 | int tipc_nl_media_get(struct sk_buff *skb, struct genl_info *info) | |
975 | { | |
976 | int err; | |
977 | char *name; | |
978 | struct tipc_nl_msg msg; | |
979 | struct tipc_media *media; | |
980 | struct sk_buff *rep; | |
981 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
982 | ||
983 | if (!info->attrs[TIPC_NLA_MEDIA]) | |
984 | return -EINVAL; | |
985 | ||
986 | err = nla_parse_nested(attrs, TIPC_NLA_MEDIA_MAX, | |
987 | info->attrs[TIPC_NLA_MEDIA], | |
988 | tipc_nl_media_policy); | |
989 | if (err) | |
990 | return err; | |
991 | ||
992 | if (!attrs[TIPC_NLA_MEDIA_NAME]) | |
993 | return -EINVAL; | |
994 | name = nla_data(attrs[TIPC_NLA_MEDIA_NAME]); | |
995 | ||
996 | rep = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); | |
997 | if (!rep) | |
998 | return -ENOMEM; | |
999 | ||
1000 | msg.skb = rep; | |
1001 | msg.portid = info->snd_portid; | |
1002 | msg.seq = info->snd_seq; | |
1003 | ||
1004 | rtnl_lock(); | |
1005 | media = tipc_media_find(name); | |
1006 | if (!media) { | |
1007 | err = -EINVAL; | |
1008 | goto err_out; | |
1009 | } | |
1010 | ||
1011 | err = __tipc_nl_add_media(&msg, media); | |
1012 | if (err) | |
1013 | goto err_out; | |
1014 | rtnl_unlock(); | |
1015 | ||
1016 | return genlmsg_reply(rep, info); | |
1017 | err_out: | |
1018 | rtnl_unlock(); | |
1019 | nlmsg_free(rep); | |
1020 | ||
1021 | return err; | |
1022 | } | |
1e55417d RA |
1023 | |
1024 | int tipc_nl_media_set(struct sk_buff *skb, struct genl_info *info) | |
1025 | { | |
1026 | int err; | |
1027 | char *name; | |
1028 | struct tipc_media *m; | |
1029 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
1030 | ||
1031 | if (!info->attrs[TIPC_NLA_MEDIA]) | |
1032 | return -EINVAL; | |
1033 | ||
1034 | err = nla_parse_nested(attrs, TIPC_NLA_MEDIA_MAX, | |
1035 | info->attrs[TIPC_NLA_MEDIA], | |
1036 | tipc_nl_media_policy); | |
1037 | ||
1038 | if (!attrs[TIPC_NLA_MEDIA_NAME]) | |
1039 | return -EINVAL; | |
1040 | name = nla_data(attrs[TIPC_NLA_MEDIA_NAME]); | |
1041 | ||
1042 | rtnl_lock(); | |
1043 | m = tipc_media_find(name); | |
1044 | if (!m) { | |
1045 | rtnl_unlock(); | |
1046 | return -EINVAL; | |
1047 | } | |
1048 | ||
1049 | if (attrs[TIPC_NLA_MEDIA_PROP]) { | |
1050 | struct nlattr *props[TIPC_NLA_PROP_MAX + 1]; | |
1051 | ||
1052 | err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_MEDIA_PROP], | |
1053 | props); | |
1054 | if (err) { | |
1055 | rtnl_unlock(); | |
1056 | return err; | |
1057 | } | |
1058 | ||
1059 | if (props[TIPC_NLA_PROP_TOL]) | |
1060 | m->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]); | |
1061 | if (props[TIPC_NLA_PROP_PRIO]) | |
1062 | m->priority = nla_get_u32(props[TIPC_NLA_PROP_PRIO]); | |
1063 | if (props[TIPC_NLA_PROP_WIN]) | |
1064 | m->window = nla_get_u32(props[TIPC_NLA_PROP_WIN]); | |
1065 | } | |
1066 | rtnl_unlock(); | |
1067 | ||
1068 | return 0; | |
1069 | } |