Commit | Line | Data |
---|---|---|
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 | */ |
50d3e639 | 263 | int tipc_enable_bearer(const char *name, u32 disc_domain, u32 priority) |
b97bf3fd | 264 | { |
2d627b92 | 265 | struct tipc_bearer *b_ptr; |
358a0d1c | 266 | struct tipc_media *m_ptr; |
f19765f4 | 267 | struct tipc_bearer_names b_names; |
b97bf3fd PL |
268 | char addr_string[16]; |
269 | u32 bearer_id; | |
270 | u32 with_this_prio; | |
271 | u32 i; | |
272 | int res = -EINVAL; | |
273 | ||
b58343f9 | 274 | if (!tipc_own_addr) { |
2cf8aa19 EH |
275 | pr_warn("Bearer <%s> rejected, not supported in standalone mode\n", |
276 | name); | |
b97bf3fd | 277 | return -ENOPROTOOPT; |
a10bd924 | 278 | } |
f19765f4 | 279 | if (!bearer_name_validate(name, &b_names)) { |
2cf8aa19 | 280 | pr_warn("Bearer <%s> rejected, illegal name\n", name); |
16cb4b33 | 281 | return -EINVAL; |
a10bd924 | 282 | } |
66e019a6 AS |
283 | if (tipc_addr_domain_valid(disc_domain) && |
284 | (disc_domain != tipc_own_addr)) { | |
285 | if (tipc_in_scope(disc_domain, tipc_own_addr)) { | |
286 | disc_domain = tipc_own_addr & TIPC_CLUSTER_MASK; | |
287 | res = 0; /* accept any node in own cluster */ | |
336ebf5b | 288 | } else if (in_own_cluster_exact(disc_domain)) |
66e019a6 AS |
289 | res = 0; /* accept specified node in own cluster */ |
290 | } | |
291 | if (res) { | |
2cf8aa19 EH |
292 | pr_warn("Bearer <%s> rejected, illegal discovery domain\n", |
293 | name); | |
a10bd924 AS |
294 | return -EINVAL; |
295 | } | |
9efde4a0 | 296 | if ((priority > TIPC_MAX_LINK_PRI) && |
a10bd924 | 297 | (priority != TIPC_MEDIA_LINK_PRI)) { |
2cf8aa19 | 298 | pr_warn("Bearer <%s> rejected, illegal priority\n", name); |
b97bf3fd | 299 | return -EINVAL; |
a10bd924 | 300 | } |
b97bf3fd | 301 | |
f19765f4 | 302 | m_ptr = tipc_media_find(b_names.media_name); |
b97bf3fd | 303 | if (!m_ptr) { |
2cf8aa19 EH |
304 | pr_warn("Bearer <%s> rejected, media <%s> not registered\n", |
305 | name, b_names.media_name); | |
7216cd94 | 306 | return -EINVAL; |
b97bf3fd | 307 | } |
16cb4b33 PL |
308 | |
309 | if (priority == TIPC_MEDIA_LINK_PRI) | |
b97bf3fd PL |
310 | priority = m_ptr->priority; |
311 | ||
312 | restart: | |
313 | bearer_id = MAX_BEARERS; | |
314 | with_this_prio = 1; | |
315 | for (i = MAX_BEARERS; i-- != 0; ) { | |
f8322dfc | 316 | b_ptr = rtnl_dereference(bearer_list[i]); |
f47de12b | 317 | if (!b_ptr) { |
b97bf3fd PL |
318 | bearer_id = i; |
319 | continue; | |
320 | } | |
3874ccbb | 321 | if (!strcmp(name, b_ptr->name)) { |
2cf8aa19 EH |
322 | pr_warn("Bearer <%s> rejected, already enabled\n", |
323 | name); | |
7216cd94 | 324 | return -EINVAL; |
b97bf3fd | 325 | } |
3874ccbb | 326 | if ((b_ptr->priority == priority) && |
b97bf3fd PL |
327 | (++with_this_prio > 2)) { |
328 | if (priority-- == 0) { | |
2cf8aa19 EH |
329 | pr_warn("Bearer <%s> rejected, duplicate priority\n", |
330 | name); | |
7216cd94 | 331 | return -EINVAL; |
b97bf3fd | 332 | } |
2cf8aa19 EH |
333 | pr_warn("Bearer <%s> priority adjustment required %u->%u\n", |
334 | name, priority + 1, priority); | |
b97bf3fd PL |
335 | goto restart; |
336 | } | |
337 | } | |
338 | if (bearer_id >= MAX_BEARERS) { | |
2cf8aa19 EH |
339 | pr_warn("Bearer <%s> rejected, bearer limit reached (%u)\n", |
340 | name, MAX_BEARERS); | |
7216cd94 | 341 | return -EINVAL; |
b97bf3fd PL |
342 | } |
343 | ||
3874ccbb | 344 | b_ptr = kzalloc(sizeof(*b_ptr), GFP_ATOMIC); |
7216cd94 YX |
345 | if (!b_ptr) |
346 | return -ENOMEM; | |
347 | ||
2d627b92 | 348 | strcpy(b_ptr->name, name); |
e4d050cb | 349 | b_ptr->media = m_ptr; |
4babbaa8 | 350 | res = m_ptr->enable_media(b_ptr); |
b97bf3fd | 351 | if (res) { |
2cf8aa19 EH |
352 | pr_warn("Bearer <%s> rejected, enable failure (%d)\n", |
353 | name, -res); | |
7216cd94 | 354 | return -EINVAL; |
b97bf3fd PL |
355 | } |
356 | ||
357 | b_ptr->identity = bearer_id; | |
5c216e1d AS |
358 | b_ptr->tolerance = m_ptr->tolerance; |
359 | b_ptr->window = m_ptr->window; | |
a21a584d | 360 | b_ptr->domain = disc_domain; |
b97bf3fd | 361 | b_ptr->net_plane = bearer_id + 'A'; |
b97bf3fd | 362 | b_ptr->priority = priority; |
3a777ff8 | 363 | |
16470111 | 364 | res = tipc_disc_create(b_ptr, &b_ptr->bcast_addr); |
3a777ff8 | 365 | if (res) { |
7d33939f | 366 | bearer_disable(b_ptr, false); |
2cf8aa19 EH |
367 | pr_warn("Bearer <%s> rejected, discovery object creation failed\n", |
368 | name); | |
7216cd94 | 369 | return -EINVAL; |
3a777ff8 | 370 | } |
3874ccbb | 371 | |
f8322dfc | 372 | rcu_assign_pointer(bearer_list[bearer_id], b_ptr); |
3874ccbb | 373 | |
2cf8aa19 EH |
374 | pr_info("Enabled bearer <%s>, discovery domain %s, priority %u\n", |
375 | name, | |
376 | tipc_addr_string_fill(addr_string, disc_domain), priority); | |
b97bf3fd PL |
377 | return res; |
378 | } | |
379 | ||
380 | /** | |
512137ee | 381 | * tipc_reset_bearer - Reset all links established over this bearer |
b97bf3fd | 382 | */ |
6e967adf | 383 | static int tipc_reset_bearer(struct tipc_bearer *b_ptr) |
b97bf3fd | 384 | { |
512137ee | 385 | pr_info("Resetting bearer <%s>\n", b_ptr->name); |
c61dd61d | 386 | tipc_link_reset_list(b_ptr->identity); |
a8b9b96e | 387 | tipc_disc_reset(b_ptr); |
0e35fd5e | 388 | return 0; |
b97bf3fd PL |
389 | } |
390 | ||
391 | /** | |
617d3c7a | 392 | * bearer_disable |
c4307285 | 393 | * |
7216cd94 | 394 | * Note: This routine assumes caller holds RTNL lock. |
b97bf3fd | 395 | */ |
7d33939f | 396 | static void bearer_disable(struct tipc_bearer *b_ptr, bool shutting_down) |
b97bf3fd | 397 | { |
3874ccbb YX |
398 | u32 i; |
399 | ||
2cf8aa19 | 400 | pr_info("Disabling bearer <%s>\n", b_ptr->name); |
4babbaa8 | 401 | b_ptr->media->disable_media(b_ptr); |
d4cca39d | 402 | |
a8304529 YX |
403 | tipc_link_delete_list(b_ptr->identity, shutting_down); |
404 | if (b_ptr->link_req) | |
405 | tipc_disc_delete(b_ptr->link_req); | |
3874ccbb YX |
406 | |
407 | for (i = 0; i < MAX_BEARERS; i++) { | |
f8322dfc YX |
408 | if (b_ptr == rtnl_dereference(bearer_list[i])) { |
409 | RCU_INIT_POINTER(bearer_list[i], NULL); | |
3874ccbb YX |
410 | break; |
411 | } | |
412 | } | |
f8322dfc | 413 | kfree_rcu(b_ptr, rcu); |
b97bf3fd PL |
414 | } |
415 | ||
416 | int tipc_disable_bearer(const char *name) | |
417 | { | |
2d627b92 | 418 | struct tipc_bearer *b_ptr; |
b97bf3fd PL |
419 | int res; |
420 | ||
5c216e1d | 421 | b_ptr = tipc_bearer_find(name); |
ccc901ee | 422 | if (b_ptr == NULL) { |
2cf8aa19 | 423 | pr_warn("Attempt to disable unknown bearer <%s>\n", name); |
ccc901ee | 424 | res = -EINVAL; |
28cc937e | 425 | } else { |
7d33939f | 426 | bearer_disable(b_ptr, false); |
28cc937e AS |
427 | res = 0; |
428 | } | |
b97bf3fd PL |
429 | return res; |
430 | } | |
431 | ||
e4d050cb YX |
432 | int tipc_enable_l2_media(struct tipc_bearer *b) |
433 | { | |
434 | struct net_device *dev; | |
435 | char *driver_name = strchr((const char *)b->name, ':') + 1; | |
436 | ||
437 | /* Find device with specified name */ | |
438 | dev = dev_get_by_name(&init_net, driver_name); | |
439 | if (!dev) | |
440 | return -ENODEV; | |
441 | ||
38504c28 | 442 | /* Associate TIPC bearer with L2 bearer */ |
2231c5af | 443 | rcu_assign_pointer(b->media_ptr, dev); |
38504c28 | 444 | memset(&b->bcast_addr, 0, sizeof(b->bcast_addr)); |
e4d050cb YX |
445 | memcpy(b->bcast_addr.value, dev->broadcast, b->media->hwaddr_len); |
446 | b->bcast_addr.media_id = b->media->type_id; | |
447 | b->bcast_addr.broadcast = 1; | |
448 | b->mtu = dev->mtu; | |
38504c28 | 449 | b->media->raw2addr(b, &b->addr, (char *)dev->dev_addr); |
e4d050cb YX |
450 | rcu_assign_pointer(dev->tipc_ptr, b); |
451 | return 0; | |
452 | } | |
453 | ||
38504c28 | 454 | /* tipc_disable_l2_media - detach TIPC bearer from an L2 interface |
e4d050cb | 455 | * |
38504c28 | 456 | * Mark L2 bearer as inactive so that incoming buffers are thrown away, |
e4d050cb YX |
457 | * then get worker thread to complete bearer cleanup. (Can't do cleanup |
458 | * here because cleanup code needs to sleep and caller holds spinlocks.) | |
459 | */ | |
460 | void tipc_disable_l2_media(struct tipc_bearer *b) | |
461 | { | |
2231c5af YX |
462 | struct net_device *dev; |
463 | ||
464 | dev = (struct net_device *)rtnl_dereference(b->media_ptr); | |
465 | RCU_INIT_POINTER(b->media_ptr, NULL); | |
e4d050cb | 466 | RCU_INIT_POINTER(dev->tipc_ptr, NULL); |
f1c8d8cb | 467 | synchronize_net(); |
e4d050cb YX |
468 | dev_put(dev); |
469 | } | |
470 | ||
471 | /** | |
38504c28 | 472 | * tipc_l2_send_msg - send a TIPC packet out over an L2 interface |
e4d050cb | 473 | * @buf: the packet to be sent |
963a1855 | 474 | * @b_ptr: the bearer through which the packet is to be sent |
e4d050cb YX |
475 | * @dest: peer destination address |
476 | */ | |
477 | int tipc_l2_send_msg(struct sk_buff *buf, struct tipc_bearer *b, | |
478 | struct tipc_media_addr *dest) | |
479 | { | |
480 | struct sk_buff *clone; | |
2231c5af | 481 | struct net_device *dev; |
e4d050cb | 482 | int delta; |
2231c5af YX |
483 | |
484 | dev = (struct net_device *)rcu_dereference_rtnl(b->media_ptr); | |
485 | if (!dev) | |
486 | return 0; | |
e4d050cb YX |
487 | |
488 | clone = skb_clone(buf, GFP_ATOMIC); | |
489 | if (!clone) | |
490 | return 0; | |
491 | ||
492 | delta = dev->hard_header_len - skb_headroom(buf); | |
493 | if ((delta > 0) && | |
494 | pskb_expand_head(clone, SKB_DATA_ALIGN(delta), 0, GFP_ATOMIC)) { | |
495 | kfree_skb(clone); | |
496 | return 0; | |
497 | } | |
498 | ||
499 | skb_reset_network_header(clone); | |
500 | clone->dev = dev; | |
501 | clone->protocol = htons(ETH_P_TIPC); | |
502 | dev_hard_header(clone, dev, ETH_P_TIPC, dest->value, | |
503 | dev->dev_addr, clone->len); | |
504 | dev_queue_xmit(clone); | |
505 | return 0; | |
506 | } | |
507 | ||
508 | /* tipc_bearer_send- sends buffer to destination over bearer | |
509 | * | |
510 | * IMPORTANT: | |
511 | * The media send routine must not alter the buffer being passed in | |
512 | * as it may be needed for later retransmission! | |
513 | */ | |
7a2f7d18 | 514 | void tipc_bearer_send(u32 bearer_id, struct sk_buff *buf, |
e4d050cb YX |
515 | struct tipc_media_addr *dest) |
516 | { | |
7a2f7d18 YX |
517 | struct tipc_bearer *b_ptr; |
518 | ||
519 | rcu_read_lock(); | |
520 | b_ptr = rcu_dereference_rtnl(bearer_list[bearer_id]); | |
521 | if (likely(b_ptr)) | |
522 | b_ptr->media->send_msg(buf, b_ptr, dest); | |
523 | rcu_read_unlock(); | |
e4d050cb YX |
524 | } |
525 | ||
6e967adf YX |
526 | /** |
527 | * tipc_l2_rcv_msg - handle incoming TIPC message from an interface | |
528 | * @buf: the received packet | |
529 | * @dev: the net device that the packet was received on | |
530 | * @pt: the packet_type structure which was used to register this handler | |
531 | * @orig_dev: the original receive net device in case the device is a bond | |
532 | * | |
533 | * Accept only packets explicitly sent to this node, or broadcast packets; | |
534 | * ignores packets sent using interface multicast, and traffic sent to other | |
535 | * nodes (which can happen if interface is running in promiscuous mode). | |
536 | */ | |
537 | static int tipc_l2_rcv_msg(struct sk_buff *buf, struct net_device *dev, | |
538 | struct packet_type *pt, struct net_device *orig_dev) | |
539 | { | |
540 | struct tipc_bearer *b_ptr; | |
541 | ||
542 | if (!net_eq(dev_net(dev), &init_net)) { | |
543 | kfree_skb(buf); | |
544 | return NET_RX_DROP; | |
545 | } | |
546 | ||
547 | rcu_read_lock(); | |
ca07fb07 | 548 | b_ptr = rcu_dereference_rtnl(dev->tipc_ptr); |
6e967adf YX |
549 | if (likely(b_ptr)) { |
550 | if (likely(buf->pkt_type <= PACKET_BROADCAST)) { | |
551 | buf->next = NULL; | |
170b3927 | 552 | tipc_rcv(buf, b_ptr); |
6e967adf YX |
553 | rcu_read_unlock(); |
554 | return NET_RX_SUCCESS; | |
555 | } | |
556 | } | |
557 | rcu_read_unlock(); | |
558 | ||
559 | kfree_skb(buf); | |
560 | return NET_RX_DROP; | |
561 | } | |
562 | ||
563 | /** | |
564 | * tipc_l2_device_event - handle device events from network device | |
565 | * @nb: the context of the notification | |
566 | * @evt: the type of event | |
567 | * @ptr: the net device that the event was on | |
568 | * | |
569 | * This function is called by the Ethernet driver in case of link | |
570 | * change event. | |
571 | */ | |
572 | static int tipc_l2_device_event(struct notifier_block *nb, unsigned long evt, | |
573 | void *ptr) | |
574 | { | |
575 | struct tipc_bearer *b_ptr; | |
576 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); | |
b97bf3fd | 577 | |
6e967adf YX |
578 | if (!net_eq(dev_net(dev), &init_net)) |
579 | return NOTIFY_DONE; | |
580 | ||
ca07fb07 YX |
581 | b_ptr = rtnl_dereference(dev->tipc_ptr); |
582 | if (!b_ptr) | |
6e967adf | 583 | return NOTIFY_DONE; |
6e967adf YX |
584 | |
585 | b_ptr->mtu = dev->mtu; | |
586 | ||
587 | switch (evt) { | |
588 | case NETDEV_CHANGE: | |
589 | if (netif_carrier_ok(dev)) | |
590 | break; | |
591 | case NETDEV_DOWN: | |
592 | case NETDEV_CHANGEMTU: | |
a21a584d EH |
593 | tipc_reset_bearer(b_ptr); |
594 | break; | |
6e967adf | 595 | case NETDEV_CHANGEADDR: |
38504c28 | 596 | b_ptr->media->raw2addr(b_ptr, &b_ptr->addr, |
a21a584d | 597 | (char *)dev->dev_addr); |
6e967adf YX |
598 | tipc_reset_bearer(b_ptr); |
599 | break; | |
600 | case NETDEV_UNREGISTER: | |
601 | case NETDEV_CHANGENAME: | |
4ae88c94 | 602 | bearer_disable(b_ptr, false); |
6e967adf YX |
603 | break; |
604 | } | |
6e967adf YX |
605 | return NOTIFY_OK; |
606 | } | |
607 | ||
608 | static struct packet_type tipc_packet_type __read_mostly = { | |
184593c7 | 609 | .type = htons(ETH_P_TIPC), |
6e967adf YX |
610 | .func = tipc_l2_rcv_msg, |
611 | }; | |
612 | ||
613 | static struct notifier_block notifier = { | |
614 | .notifier_call = tipc_l2_device_event, | |
615 | .priority = 0, | |
616 | }; | |
617 | ||
618 | int tipc_bearer_setup(void) | |
619 | { | |
970122fd YX |
620 | int err; |
621 | ||
622 | err = register_netdevice_notifier(¬ifier); | |
623 | if (err) | |
624 | return err; | |
6e967adf | 625 | dev_add_pack(&tipc_packet_type); |
970122fd | 626 | return 0; |
6e967adf YX |
627 | } |
628 | ||
629 | void tipc_bearer_cleanup(void) | |
630 | { | |
631 | unregister_netdevice_notifier(¬ifier); | |
632 | dev_remove_pack(&tipc_packet_type); | |
633 | } | |
b97bf3fd | 634 | |
4323add6 | 635 | void tipc_bearer_stop(void) |
b97bf3fd | 636 | { |
3874ccbb | 637 | struct tipc_bearer *b_ptr; |
b97bf3fd PL |
638 | u32 i; |
639 | ||
b97bf3fd | 640 | for (i = 0; i < MAX_BEARERS; i++) { |
f8322dfc | 641 | b_ptr = rtnl_dereference(bearer_list[i]); |
f47de12b | 642 | if (b_ptr) { |
3874ccbb YX |
643 | bearer_disable(b_ptr, true); |
644 | bearer_list[i] = NULL; | |
645 | } | |
b97bf3fd | 646 | } |
b97bf3fd | 647 | } |
0655f6a8 | 648 | |
35b9dd76 | 649 | /* Caller should hold rtnl_lock to protect the bearer */ |
d8182804 RA |
650 | static int __tipc_nl_add_bearer(struct tipc_nl_msg *msg, |
651 | struct tipc_bearer *bearer) | |
35b9dd76 RA |
652 | { |
653 | void *hdr; | |
654 | struct nlattr *attrs; | |
655 | struct nlattr *prop; | |
656 | ||
657 | hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_v2_family, | |
658 | NLM_F_MULTI, TIPC_NL_BEARER_GET); | |
659 | if (!hdr) | |
660 | return -EMSGSIZE; | |
661 | ||
662 | attrs = nla_nest_start(msg->skb, TIPC_NLA_BEARER); | |
663 | if (!attrs) | |
664 | goto msg_full; | |
665 | ||
666 | if (nla_put_string(msg->skb, TIPC_NLA_BEARER_NAME, bearer->name)) | |
667 | goto attr_msg_full; | |
668 | ||
669 | prop = nla_nest_start(msg->skb, TIPC_NLA_BEARER_PROP); | |
670 | if (!prop) | |
671 | goto prop_msg_full; | |
672 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, bearer->priority)) | |
673 | goto prop_msg_full; | |
674 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, bearer->tolerance)) | |
675 | goto prop_msg_full; | |
676 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, bearer->window)) | |
677 | goto prop_msg_full; | |
678 | ||
679 | nla_nest_end(msg->skb, prop); | |
680 | nla_nest_end(msg->skb, attrs); | |
681 | genlmsg_end(msg->skb, hdr); | |
682 | ||
683 | return 0; | |
684 | ||
685 | prop_msg_full: | |
686 | nla_nest_cancel(msg->skb, prop); | |
687 | attr_msg_full: | |
688 | nla_nest_cancel(msg->skb, attrs); | |
689 | msg_full: | |
690 | genlmsg_cancel(msg->skb, hdr); | |
691 | ||
692 | return -EMSGSIZE; | |
693 | } | |
694 | ||
695 | int tipc_nl_bearer_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
696 | { | |
697 | int err; | |
698 | int i = cb->args[0]; | |
699 | struct tipc_bearer *bearer; | |
700 | struct tipc_nl_msg msg; | |
701 | ||
702 | if (i == MAX_BEARERS) | |
703 | return 0; | |
704 | ||
705 | msg.skb = skb; | |
706 | msg.portid = NETLINK_CB(cb->skb).portid; | |
707 | msg.seq = cb->nlh->nlmsg_seq; | |
708 | ||
709 | rtnl_lock(); | |
710 | for (i = 0; i < MAX_BEARERS; i++) { | |
711 | bearer = rtnl_dereference(bearer_list[i]); | |
712 | if (!bearer) | |
713 | continue; | |
714 | ||
715 | err = __tipc_nl_add_bearer(&msg, bearer); | |
716 | if (err) | |
717 | break; | |
718 | } | |
719 | rtnl_unlock(); | |
720 | ||
721 | cb->args[0] = i; | |
722 | return skb->len; | |
723 | } | |
724 | ||
725 | int tipc_nl_bearer_get(struct sk_buff *skb, struct genl_info *info) | |
726 | { | |
727 | int err; | |
728 | char *name; | |
729 | struct sk_buff *rep; | |
730 | struct tipc_bearer *bearer; | |
731 | struct tipc_nl_msg msg; | |
732 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
733 | ||
734 | if (!info->attrs[TIPC_NLA_BEARER]) | |
735 | return -EINVAL; | |
736 | ||
737 | err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX, | |
738 | info->attrs[TIPC_NLA_BEARER], | |
739 | tipc_nl_bearer_policy); | |
740 | if (err) | |
741 | return err; | |
742 | ||
743 | if (!attrs[TIPC_NLA_BEARER_NAME]) | |
744 | return -EINVAL; | |
745 | name = nla_data(attrs[TIPC_NLA_BEARER_NAME]); | |
746 | ||
747 | rep = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); | |
748 | if (!rep) | |
749 | return -ENOMEM; | |
750 | ||
751 | msg.skb = rep; | |
752 | msg.portid = info->snd_portid; | |
753 | msg.seq = info->snd_seq; | |
754 | ||
755 | rtnl_lock(); | |
756 | bearer = tipc_bearer_find(name); | |
757 | if (!bearer) { | |
758 | err = -EINVAL; | |
759 | goto err_out; | |
760 | } | |
761 | ||
762 | err = __tipc_nl_add_bearer(&msg, bearer); | |
763 | if (err) | |
764 | goto err_out; | |
765 | rtnl_unlock(); | |
766 | ||
767 | return genlmsg_reply(rep, info); | |
768 | err_out: | |
769 | rtnl_unlock(); | |
770 | nlmsg_free(rep); | |
771 | ||
772 | return err; | |
773 | } | |
774 | ||
0655f6a8 RA |
775 | int tipc_nl_bearer_disable(struct sk_buff *skb, struct genl_info *info) |
776 | { | |
777 | int err; | |
778 | char *name; | |
779 | struct tipc_bearer *bearer; | |
780 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
781 | ||
782 | if (!info->attrs[TIPC_NLA_BEARER]) | |
783 | return -EINVAL; | |
784 | ||
785 | err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX, | |
786 | info->attrs[TIPC_NLA_BEARER], | |
787 | tipc_nl_bearer_policy); | |
788 | if (err) | |
789 | return err; | |
790 | ||
791 | if (!attrs[TIPC_NLA_BEARER_NAME]) | |
792 | return -EINVAL; | |
793 | ||
794 | name = nla_data(attrs[TIPC_NLA_BEARER_NAME]); | |
795 | ||
796 | rtnl_lock(); | |
797 | bearer = tipc_bearer_find(name); | |
798 | if (!bearer) { | |
799 | rtnl_unlock(); | |
800 | return -EINVAL; | |
801 | } | |
802 | ||
803 | bearer_disable(bearer, false); | |
804 | rtnl_unlock(); | |
805 | ||
806 | return 0; | |
807 | } | |
808 | ||
809 | int tipc_nl_bearer_enable(struct sk_buff *skb, struct genl_info *info) | |
810 | { | |
811 | int err; | |
812 | char *bearer; | |
813 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
814 | u32 domain; | |
815 | u32 prio; | |
816 | ||
817 | prio = TIPC_MEDIA_LINK_PRI; | |
818 | domain = tipc_own_addr & TIPC_CLUSTER_MASK; | |
819 | ||
820 | if (!info->attrs[TIPC_NLA_BEARER]) | |
821 | return -EINVAL; | |
822 | ||
823 | err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX, | |
824 | info->attrs[TIPC_NLA_BEARER], | |
825 | tipc_nl_bearer_policy); | |
826 | if (err) | |
827 | return err; | |
828 | ||
829 | if (!attrs[TIPC_NLA_BEARER_NAME]) | |
830 | return -EINVAL; | |
831 | ||
832 | bearer = nla_data(attrs[TIPC_NLA_BEARER_NAME]); | |
833 | ||
834 | if (attrs[TIPC_NLA_BEARER_DOMAIN]) | |
835 | domain = nla_get_u32(attrs[TIPC_NLA_BEARER_DOMAIN]); | |
836 | ||
837 | if (attrs[TIPC_NLA_BEARER_PROP]) { | |
838 | struct nlattr *props[TIPC_NLA_PROP_MAX + 1]; | |
839 | ||
840 | err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_BEARER_PROP], | |
841 | props); | |
842 | if (err) | |
843 | return err; | |
844 | ||
845 | if (props[TIPC_NLA_PROP_PRIO]) | |
846 | prio = nla_get_u32(props[TIPC_NLA_PROP_PRIO]); | |
847 | } | |
848 | ||
849 | rtnl_lock(); | |
850 | err = tipc_enable_bearer(bearer, domain, prio); | |
851 | if (err) { | |
852 | rtnl_unlock(); | |
853 | return err; | |
854 | } | |
855 | rtnl_unlock(); | |
856 | ||
857 | return 0; | |
858 | } | |
315c00bc RA |
859 | |
860 | int tipc_nl_bearer_set(struct sk_buff *skb, struct genl_info *info) | |
861 | { | |
862 | int err; | |
863 | char *name; | |
864 | struct tipc_bearer *b; | |
865 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
866 | ||
867 | if (!info->attrs[TIPC_NLA_BEARER]) | |
868 | return -EINVAL; | |
869 | ||
870 | err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX, | |
871 | info->attrs[TIPC_NLA_BEARER], | |
872 | tipc_nl_bearer_policy); | |
873 | if (err) | |
874 | return err; | |
875 | ||
876 | if (!attrs[TIPC_NLA_BEARER_NAME]) | |
877 | return -EINVAL; | |
878 | name = nla_data(attrs[TIPC_NLA_BEARER_NAME]); | |
879 | ||
880 | rtnl_lock(); | |
881 | b = tipc_bearer_find(name); | |
882 | if (!b) { | |
883 | rtnl_unlock(); | |
884 | return -EINVAL; | |
885 | } | |
886 | ||
887 | if (attrs[TIPC_NLA_BEARER_PROP]) { | |
888 | struct nlattr *props[TIPC_NLA_PROP_MAX + 1]; | |
889 | ||
890 | err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_BEARER_PROP], | |
891 | props); | |
892 | if (err) { | |
893 | rtnl_unlock(); | |
894 | return err; | |
895 | } | |
896 | ||
897 | if (props[TIPC_NLA_PROP_TOL]) | |
898 | b->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]); | |
899 | if (props[TIPC_NLA_PROP_PRIO]) | |
900 | b->priority = nla_get_u32(props[TIPC_NLA_PROP_PRIO]); | |
901 | if (props[TIPC_NLA_PROP_WIN]) | |
902 | b->window = nla_get_u32(props[TIPC_NLA_PROP_WIN]); | |
903 | } | |
904 | rtnl_unlock(); | |
905 | ||
906 | return 0; | |
907 | } | |
46f15c67 | 908 | |
d8182804 RA |
909 | static int __tipc_nl_add_media(struct tipc_nl_msg *msg, |
910 | struct tipc_media *media) | |
46f15c67 RA |
911 | { |
912 | void *hdr; | |
913 | struct nlattr *attrs; | |
914 | struct nlattr *prop; | |
915 | ||
916 | hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_v2_family, | |
917 | NLM_F_MULTI, TIPC_NL_MEDIA_GET); | |
918 | if (!hdr) | |
919 | return -EMSGSIZE; | |
920 | ||
921 | attrs = nla_nest_start(msg->skb, TIPC_NLA_MEDIA); | |
922 | if (!attrs) | |
923 | goto msg_full; | |
924 | ||
925 | if (nla_put_string(msg->skb, TIPC_NLA_MEDIA_NAME, media->name)) | |
926 | goto attr_msg_full; | |
927 | ||
928 | prop = nla_nest_start(msg->skb, TIPC_NLA_MEDIA_PROP); | |
929 | if (!prop) | |
930 | goto prop_msg_full; | |
931 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, media->priority)) | |
932 | goto prop_msg_full; | |
933 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, media->tolerance)) | |
934 | goto prop_msg_full; | |
935 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, media->window)) | |
936 | goto prop_msg_full; | |
937 | ||
938 | nla_nest_end(msg->skb, prop); | |
939 | nla_nest_end(msg->skb, attrs); | |
940 | genlmsg_end(msg->skb, hdr); | |
941 | ||
942 | return 0; | |
943 | ||
944 | prop_msg_full: | |
945 | nla_nest_cancel(msg->skb, prop); | |
946 | attr_msg_full: | |
947 | nla_nest_cancel(msg->skb, attrs); | |
948 | msg_full: | |
949 | genlmsg_cancel(msg->skb, hdr); | |
950 | ||
951 | return -EMSGSIZE; | |
952 | } | |
953 | ||
954 | int tipc_nl_media_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
955 | { | |
956 | int err; | |
957 | int i = cb->args[0]; | |
958 | struct tipc_nl_msg msg; | |
959 | ||
960 | if (i == MAX_MEDIA) | |
961 | return 0; | |
962 | ||
963 | msg.skb = skb; | |
964 | msg.portid = NETLINK_CB(cb->skb).portid; | |
965 | msg.seq = cb->nlh->nlmsg_seq; | |
966 | ||
967 | rtnl_lock(); | |
968 | for (; media_info_array[i] != NULL; i++) { | |
969 | err = __tipc_nl_add_media(&msg, media_info_array[i]); | |
970 | if (err) | |
971 | break; | |
972 | } | |
973 | rtnl_unlock(); | |
974 | ||
975 | cb->args[0] = i; | |
976 | return skb->len; | |
977 | } | |
978 | ||
979 | int tipc_nl_media_get(struct sk_buff *skb, struct genl_info *info) | |
980 | { | |
981 | int err; | |
982 | char *name; | |
983 | struct tipc_nl_msg msg; | |
984 | struct tipc_media *media; | |
985 | struct sk_buff *rep; | |
986 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
987 | ||
988 | if (!info->attrs[TIPC_NLA_MEDIA]) | |
989 | return -EINVAL; | |
990 | ||
991 | err = nla_parse_nested(attrs, TIPC_NLA_MEDIA_MAX, | |
992 | info->attrs[TIPC_NLA_MEDIA], | |
993 | tipc_nl_media_policy); | |
994 | if (err) | |
995 | return err; | |
996 | ||
997 | if (!attrs[TIPC_NLA_MEDIA_NAME]) | |
998 | return -EINVAL; | |
999 | name = nla_data(attrs[TIPC_NLA_MEDIA_NAME]); | |
1000 | ||
1001 | rep = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); | |
1002 | if (!rep) | |
1003 | return -ENOMEM; | |
1004 | ||
1005 | msg.skb = rep; | |
1006 | msg.portid = info->snd_portid; | |
1007 | msg.seq = info->snd_seq; | |
1008 | ||
1009 | rtnl_lock(); | |
1010 | media = tipc_media_find(name); | |
1011 | if (!media) { | |
1012 | err = -EINVAL; | |
1013 | goto err_out; | |
1014 | } | |
1015 | ||
1016 | err = __tipc_nl_add_media(&msg, media); | |
1017 | if (err) | |
1018 | goto err_out; | |
1019 | rtnl_unlock(); | |
1020 | ||
1021 | return genlmsg_reply(rep, info); | |
1022 | err_out: | |
1023 | rtnl_unlock(); | |
1024 | nlmsg_free(rep); | |
1025 | ||
1026 | return err; | |
1027 | } | |
1e55417d RA |
1028 | |
1029 | int tipc_nl_media_set(struct sk_buff *skb, struct genl_info *info) | |
1030 | { | |
1031 | int err; | |
1032 | char *name; | |
1033 | struct tipc_media *m; | |
1034 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
1035 | ||
1036 | if (!info->attrs[TIPC_NLA_MEDIA]) | |
1037 | return -EINVAL; | |
1038 | ||
1039 | err = nla_parse_nested(attrs, TIPC_NLA_MEDIA_MAX, | |
1040 | info->attrs[TIPC_NLA_MEDIA], | |
1041 | tipc_nl_media_policy); | |
1042 | ||
1043 | if (!attrs[TIPC_NLA_MEDIA_NAME]) | |
1044 | return -EINVAL; | |
1045 | name = nla_data(attrs[TIPC_NLA_MEDIA_NAME]); | |
1046 | ||
1047 | rtnl_lock(); | |
1048 | m = tipc_media_find(name); | |
1049 | if (!m) { | |
1050 | rtnl_unlock(); | |
1051 | return -EINVAL; | |
1052 | } | |
1053 | ||
1054 | if (attrs[TIPC_NLA_MEDIA_PROP]) { | |
1055 | struct nlattr *props[TIPC_NLA_PROP_MAX + 1]; | |
1056 | ||
1057 | err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_MEDIA_PROP], | |
1058 | props); | |
1059 | if (err) { | |
1060 | rtnl_unlock(); | |
1061 | return err; | |
1062 | } | |
1063 | ||
1064 | if (props[TIPC_NLA_PROP_TOL]) | |
1065 | m->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]); | |
1066 | if (props[TIPC_NLA_PROP_PRIO]) | |
1067 | m->priority = nla_get_u32(props[TIPC_NLA_PROP_PRIO]); | |
1068 | if (props[TIPC_NLA_PROP_WIN]) | |
1069 | m->window = nla_get_u32(props[TIPC_NLA_PROP_WIN]); | |
1070 | } | |
1071 | rtnl_unlock(); | |
1072 | ||
1073 | return 0; | |
1074 | } |