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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 | ||
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, | |
d0f91938 EH |
50 | #endif |
51 | #ifdef CONFIG_TIPC_MEDIA_UDP | |
52 | &udp_media_info, | |
5702dbab JPM |
53 | #endif |
54 | NULL | |
55 | }; | |
b97bf3fd | 56 | |
0655f6a8 RA |
57 | static const struct nla_policy |
58 | tipc_nl_bearer_policy[TIPC_NLA_BEARER_MAX + 1] = { | |
59 | [TIPC_NLA_BEARER_UNSPEC] = { .type = NLA_UNSPEC }, | |
60 | [TIPC_NLA_BEARER_NAME] = { | |
61 | .type = NLA_STRING, | |
62 | .len = TIPC_MAX_BEARER_NAME | |
63 | }, | |
64 | [TIPC_NLA_BEARER_PROP] = { .type = NLA_NESTED }, | |
65 | [TIPC_NLA_BEARER_DOMAIN] = { .type = NLA_U32 } | |
66 | }; | |
67 | ||
46f15c67 RA |
68 | static const struct nla_policy tipc_nl_media_policy[TIPC_NLA_MEDIA_MAX + 1] = { |
69 | [TIPC_NLA_MEDIA_UNSPEC] = { .type = NLA_UNSPEC }, | |
70 | [TIPC_NLA_MEDIA_NAME] = { .type = NLA_STRING }, | |
71 | [TIPC_NLA_MEDIA_PROP] = { .type = NLA_NESTED } | |
72 | }; | |
73 | ||
f2f9800d YX |
74 | static void bearer_disable(struct net *net, struct tipc_bearer *b_ptr, |
75 | bool shutting_down); | |
3a777ff8 | 76 | |
b97bf3fd | 77 | /** |
5c216e1d | 78 | * tipc_media_find - locates specified media object by name |
b97bf3fd | 79 | */ |
358a0d1c | 80 | struct tipc_media *tipc_media_find(const char *name) |
b97bf3fd | 81 | { |
b97bf3fd PL |
82 | u32 i; |
83 | ||
ef72a7e0 JPM |
84 | for (i = 0; media_info_array[i] != NULL; i++) { |
85 | if (!strcmp(media_info_array[i]->name, name)) | |
5702dbab | 86 | break; |
b97bf3fd | 87 | } |
ef72a7e0 | 88 | return media_info_array[i]; |
b97bf3fd PL |
89 | } |
90 | ||
c79be454 AS |
91 | /** |
92 | * media_find_id - locates specified media object by type identifier | |
93 | */ | |
358a0d1c | 94 | static struct tipc_media *media_find_id(u8 type) |
c79be454 AS |
95 | { |
96 | u32 i; | |
97 | ||
ef72a7e0 JPM |
98 | for (i = 0; media_info_array[i] != NULL; i++) { |
99 | if (media_info_array[i]->type_id == type) | |
5702dbab | 100 | break; |
c79be454 | 101 | } |
ef72a7e0 | 102 | return media_info_array[i]; |
b97bf3fd PL |
103 | } |
104 | ||
105 | /** | |
4323add6 | 106 | * tipc_media_addr_printf - record media address in print buffer |
b97bf3fd | 107 | */ |
dc1aed37 | 108 | void tipc_media_addr_printf(char *buf, int len, struct tipc_media_addr *a) |
b97bf3fd | 109 | { |
c61b666e | 110 | char addr_str[MAX_ADDR_STR]; |
358a0d1c | 111 | struct tipc_media *m_ptr; |
dc1aed37 | 112 | int ret; |
b97bf3fd | 113 | |
3d749a6a | 114 | m_ptr = media_find_id(a->media_id); |
b97bf3fd | 115 | |
c61b666e | 116 | if (m_ptr && !m_ptr->addr2str(a, addr_str, sizeof(addr_str))) |
941787b8 | 117 | ret = scnprintf(buf, len, "%s(%s)", m_ptr->name, addr_str); |
c61b666e | 118 | else { |
c61b666e | 119 | u32 i; |
b97bf3fd | 120 | |
941787b8 | 121 | ret = scnprintf(buf, len, "UNKNOWN(%u)", a->media_id); |
3d749a6a | 122 | for (i = 0; i < sizeof(a->value); i++) |
941787b8 | 123 | ret += scnprintf(buf - ret, len + ret, |
dc1aed37 | 124 | "-%02x", a->value[i]); |
b97bf3fd PL |
125 | } |
126 | } | |
127 | ||
b97bf3fd PL |
128 | /** |
129 | * bearer_name_validate - validate & (optionally) deconstruct bearer name | |
2c53040f BH |
130 | * @name: ptr to bearer name string |
131 | * @name_parts: ptr to area for bearer name components (or NULL if not needed) | |
c4307285 | 132 | * |
b97bf3fd PL |
133 | * Returns 1 if bearer name is valid, otherwise 0. |
134 | */ | |
c4307285 | 135 | static int bearer_name_validate(const char *name, |
f19765f4 | 136 | struct tipc_bearer_names *name_parts) |
b97bf3fd PL |
137 | { |
138 | char name_copy[TIPC_MAX_BEARER_NAME]; | |
139 | char *media_name; | |
140 | char *if_name; | |
141 | u32 media_len; | |
142 | u32 if_len; | |
143 | ||
144 | /* copy bearer name & ensure length is OK */ | |
b97bf3fd PL |
145 | name_copy[TIPC_MAX_BEARER_NAME - 1] = 0; |
146 | /* need above in case non-Posix strncpy() doesn't pad with nulls */ | |
147 | strncpy(name_copy, name, TIPC_MAX_BEARER_NAME); | |
148 | if (name_copy[TIPC_MAX_BEARER_NAME - 1] != 0) | |
149 | return 0; | |
150 | ||
151 | /* ensure all component parts of bearer name are present */ | |
b97bf3fd | 152 | media_name = name_copy; |
2db9983a AS |
153 | if_name = strchr(media_name, ':'); |
154 | if (if_name == NULL) | |
b97bf3fd PL |
155 | return 0; |
156 | *(if_name++) = 0; | |
157 | media_len = if_name - media_name; | |
158 | if_len = strlen(if_name) + 1; | |
159 | ||
160 | /* validate component parts of bearer name */ | |
c4307285 | 161 | if ((media_len <= 1) || (media_len > TIPC_MAX_MEDIA_NAME) || |
fc073938 | 162 | (if_len <= 1) || (if_len > TIPC_MAX_IF_NAME)) |
b97bf3fd PL |
163 | return 0; |
164 | ||
165 | /* return bearer name components, if necessary */ | |
b97bf3fd PL |
166 | if (name_parts) { |
167 | strcpy(name_parts->media_name, media_name); | |
168 | strcpy(name_parts->if_name, if_name); | |
169 | } | |
170 | return 1; | |
171 | } | |
172 | ||
173 | /** | |
5c216e1d | 174 | * tipc_bearer_find - locates bearer object with matching bearer name |
b97bf3fd | 175 | */ |
7f9f95d9 | 176 | struct tipc_bearer *tipc_bearer_find(struct net *net, const char *name) |
b97bf3fd | 177 | { |
7f9f95d9 | 178 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
2d627b92 | 179 | struct tipc_bearer *b_ptr; |
b97bf3fd PL |
180 | u32 i; |
181 | ||
3874ccbb | 182 | for (i = 0; i < MAX_BEARERS; i++) { |
7f9f95d9 | 183 | b_ptr = rtnl_dereference(tn->bearer_list[i]); |
f47de12b | 184 | if (b_ptr && (!strcmp(b_ptr->name, name))) |
b97bf3fd PL |
185 | return b_ptr; |
186 | } | |
1fc54d8f | 187 | return NULL; |
b97bf3fd PL |
188 | } |
189 | ||
7f9f95d9 | 190 | void tipc_bearer_add_dest(struct net *net, u32 bearer_id, u32 dest) |
b97bf3fd | 191 | { |
7f9f95d9 | 192 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
7a2f7d18 YX |
193 | struct tipc_bearer *b_ptr; |
194 | ||
195 | rcu_read_lock(); | |
7f9f95d9 | 196 | b_ptr = rcu_dereference_rtnl(tn->bearer_list[bearer_id]); |
7a2f7d18 | 197 | if (b_ptr) { |
7f9f95d9 | 198 | tipc_bcbearer_sort(net, &b_ptr->nodes, dest, true); |
7a2f7d18 YX |
199 | tipc_disc_add_dest(b_ptr->link_req); |
200 | } | |
201 | rcu_read_unlock(); | |
b97bf3fd PL |
202 | } |
203 | ||
7f9f95d9 | 204 | void tipc_bearer_remove_dest(struct net *net, u32 bearer_id, u32 dest) |
b97bf3fd | 205 | { |
7f9f95d9 | 206 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
7a2f7d18 YX |
207 | struct tipc_bearer *b_ptr; |
208 | ||
209 | rcu_read_lock(); | |
7f9f95d9 | 210 | b_ptr = rcu_dereference_rtnl(tn->bearer_list[bearer_id]); |
7a2f7d18 | 211 | if (b_ptr) { |
7f9f95d9 | 212 | tipc_bcbearer_sort(net, &b_ptr->nodes, dest, false); |
7a2f7d18 YX |
213 | tipc_disc_remove_dest(b_ptr->link_req); |
214 | } | |
215 | rcu_read_unlock(); | |
b97bf3fd PL |
216 | } |
217 | ||
b97bf3fd PL |
218 | /** |
219 | * tipc_enable_bearer - enable bearer with the given name | |
c4307285 | 220 | */ |
9ab15465 | 221 | static int tipc_enable_bearer(struct net *net, const char *name, |
d0f91938 EH |
222 | u32 disc_domain, u32 priority, |
223 | struct nlattr *attr[]) | |
b97bf3fd | 224 | { |
7f9f95d9 | 225 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
2d627b92 | 226 | struct tipc_bearer *b_ptr; |
358a0d1c | 227 | struct tipc_media *m_ptr; |
f19765f4 | 228 | struct tipc_bearer_names b_names; |
b97bf3fd PL |
229 | char addr_string[16]; |
230 | u32 bearer_id; | |
231 | u32 with_this_prio; | |
232 | u32 i; | |
233 | int res = -EINVAL; | |
234 | ||
34747539 | 235 | if (!tn->own_addr) { |
2cf8aa19 EH |
236 | pr_warn("Bearer <%s> rejected, not supported in standalone mode\n", |
237 | name); | |
b97bf3fd | 238 | return -ENOPROTOOPT; |
a10bd924 | 239 | } |
f19765f4 | 240 | if (!bearer_name_validate(name, &b_names)) { |
2cf8aa19 | 241 | pr_warn("Bearer <%s> rejected, illegal name\n", name); |
16cb4b33 | 242 | return -EINVAL; |
a10bd924 | 243 | } |
66e019a6 | 244 | if (tipc_addr_domain_valid(disc_domain) && |
34747539 YX |
245 | (disc_domain != tn->own_addr)) { |
246 | if (tipc_in_scope(disc_domain, tn->own_addr)) { | |
247 | disc_domain = tn->own_addr & TIPC_CLUSTER_MASK; | |
66e019a6 | 248 | res = 0; /* accept any node in own cluster */ |
34747539 | 249 | } else if (in_own_cluster_exact(net, disc_domain)) |
66e019a6 AS |
250 | res = 0; /* accept specified node in own cluster */ |
251 | } | |
252 | if (res) { | |
2cf8aa19 EH |
253 | pr_warn("Bearer <%s> rejected, illegal discovery domain\n", |
254 | name); | |
a10bd924 AS |
255 | return -EINVAL; |
256 | } | |
9efde4a0 | 257 | if ((priority > TIPC_MAX_LINK_PRI) && |
a10bd924 | 258 | (priority != TIPC_MEDIA_LINK_PRI)) { |
2cf8aa19 | 259 | pr_warn("Bearer <%s> rejected, illegal priority\n", name); |
b97bf3fd | 260 | return -EINVAL; |
a10bd924 | 261 | } |
b97bf3fd | 262 | |
f19765f4 | 263 | m_ptr = tipc_media_find(b_names.media_name); |
b97bf3fd | 264 | if (!m_ptr) { |
2cf8aa19 EH |
265 | pr_warn("Bearer <%s> rejected, media <%s> not registered\n", |
266 | name, b_names.media_name); | |
7216cd94 | 267 | return -EINVAL; |
b97bf3fd | 268 | } |
16cb4b33 PL |
269 | |
270 | if (priority == TIPC_MEDIA_LINK_PRI) | |
b97bf3fd PL |
271 | priority = m_ptr->priority; |
272 | ||
273 | restart: | |
274 | bearer_id = MAX_BEARERS; | |
275 | with_this_prio = 1; | |
276 | for (i = MAX_BEARERS; i-- != 0; ) { | |
7f9f95d9 | 277 | b_ptr = rtnl_dereference(tn->bearer_list[i]); |
f47de12b | 278 | if (!b_ptr) { |
b97bf3fd PL |
279 | bearer_id = i; |
280 | continue; | |
281 | } | |
3874ccbb | 282 | if (!strcmp(name, b_ptr->name)) { |
2cf8aa19 EH |
283 | pr_warn("Bearer <%s> rejected, already enabled\n", |
284 | name); | |
7216cd94 | 285 | return -EINVAL; |
b97bf3fd | 286 | } |
3874ccbb | 287 | if ((b_ptr->priority == priority) && |
b97bf3fd PL |
288 | (++with_this_prio > 2)) { |
289 | if (priority-- == 0) { | |
2cf8aa19 EH |
290 | pr_warn("Bearer <%s> rejected, duplicate priority\n", |
291 | name); | |
7216cd94 | 292 | return -EINVAL; |
b97bf3fd | 293 | } |
2cf8aa19 EH |
294 | pr_warn("Bearer <%s> priority adjustment required %u->%u\n", |
295 | name, priority + 1, priority); | |
b97bf3fd PL |
296 | goto restart; |
297 | } | |
298 | } | |
299 | if (bearer_id >= MAX_BEARERS) { | |
2cf8aa19 EH |
300 | pr_warn("Bearer <%s> rejected, bearer limit reached (%u)\n", |
301 | name, MAX_BEARERS); | |
7216cd94 | 302 | return -EINVAL; |
b97bf3fd PL |
303 | } |
304 | ||
3874ccbb | 305 | b_ptr = kzalloc(sizeof(*b_ptr), GFP_ATOMIC); |
7216cd94 YX |
306 | if (!b_ptr) |
307 | return -ENOMEM; | |
308 | ||
2d627b92 | 309 | strcpy(b_ptr->name, name); |
e4d050cb | 310 | b_ptr->media = m_ptr; |
d0f91938 | 311 | res = m_ptr->enable_media(net, b_ptr, attr); |
b97bf3fd | 312 | if (res) { |
2cf8aa19 EH |
313 | pr_warn("Bearer <%s> rejected, enable failure (%d)\n", |
314 | name, -res); | |
7216cd94 | 315 | return -EINVAL; |
b97bf3fd PL |
316 | } |
317 | ||
318 | b_ptr->identity = bearer_id; | |
5c216e1d AS |
319 | b_ptr->tolerance = m_ptr->tolerance; |
320 | b_ptr->window = m_ptr->window; | |
a21a584d | 321 | b_ptr->domain = disc_domain; |
b97bf3fd | 322 | b_ptr->net_plane = bearer_id + 'A'; |
b97bf3fd | 323 | b_ptr->priority = priority; |
3a777ff8 | 324 | |
c93d3baa | 325 | res = tipc_disc_create(net, b_ptr, &b_ptr->bcast_addr); |
3a777ff8 | 326 | if (res) { |
f2f9800d | 327 | bearer_disable(net, b_ptr, false); |
2cf8aa19 EH |
328 | pr_warn("Bearer <%s> rejected, discovery object creation failed\n", |
329 | name); | |
7216cd94 | 330 | return -EINVAL; |
3a777ff8 | 331 | } |
3874ccbb | 332 | |
7f9f95d9 | 333 | rcu_assign_pointer(tn->bearer_list[bearer_id], b_ptr); |
3874ccbb | 334 | |
2cf8aa19 EH |
335 | pr_info("Enabled bearer <%s>, discovery domain %s, priority %u\n", |
336 | name, | |
337 | tipc_addr_string_fill(addr_string, disc_domain), priority); | |
b97bf3fd PL |
338 | return res; |
339 | } | |
340 | ||
341 | /** | |
512137ee | 342 | * tipc_reset_bearer - Reset all links established over this bearer |
b97bf3fd | 343 | */ |
c93d3baa | 344 | static int tipc_reset_bearer(struct net *net, struct tipc_bearer *b_ptr) |
b97bf3fd | 345 | { |
512137ee | 346 | pr_info("Resetting bearer <%s>\n", b_ptr->name); |
f2f9800d | 347 | tipc_link_reset_list(net, b_ptr->identity); |
c93d3baa | 348 | tipc_disc_reset(net, b_ptr); |
0e35fd5e | 349 | return 0; |
b97bf3fd PL |
350 | } |
351 | ||
352 | /** | |
617d3c7a | 353 | * bearer_disable |
c4307285 | 354 | * |
7216cd94 | 355 | * Note: This routine assumes caller holds RTNL lock. |
b97bf3fd | 356 | */ |
f2f9800d YX |
357 | static void bearer_disable(struct net *net, struct tipc_bearer *b_ptr, |
358 | bool shutting_down) | |
b97bf3fd | 359 | { |
7f9f95d9 | 360 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
3874ccbb YX |
361 | u32 i; |
362 | ||
2cf8aa19 | 363 | pr_info("Disabling bearer <%s>\n", b_ptr->name); |
4babbaa8 | 364 | b_ptr->media->disable_media(b_ptr); |
d4cca39d | 365 | |
f2f9800d | 366 | tipc_link_delete_list(net, b_ptr->identity, shutting_down); |
a8304529 YX |
367 | if (b_ptr->link_req) |
368 | tipc_disc_delete(b_ptr->link_req); | |
3874ccbb YX |
369 | |
370 | for (i = 0; i < MAX_BEARERS; i++) { | |
7f9f95d9 YX |
371 | if (b_ptr == rtnl_dereference(tn->bearer_list[i])) { |
372 | RCU_INIT_POINTER(tn->bearer_list[i], NULL); | |
3874ccbb YX |
373 | break; |
374 | } | |
375 | } | |
f8322dfc | 376 | kfree_rcu(b_ptr, rcu); |
b97bf3fd PL |
377 | } |
378 | ||
d0f91938 EH |
379 | int tipc_enable_l2_media(struct net *net, struct tipc_bearer *b, |
380 | struct nlattr *attr[]) | |
e4d050cb YX |
381 | { |
382 | struct net_device *dev; | |
383 | char *driver_name = strchr((const char *)b->name, ':') + 1; | |
384 | ||
385 | /* Find device with specified name */ | |
7f9f95d9 | 386 | dev = dev_get_by_name(net, driver_name); |
e4d050cb YX |
387 | if (!dev) |
388 | return -ENODEV; | |
389 | ||
38504c28 | 390 | /* Associate TIPC bearer with L2 bearer */ |
2231c5af | 391 | rcu_assign_pointer(b->media_ptr, dev); |
38504c28 | 392 | memset(&b->bcast_addr, 0, sizeof(b->bcast_addr)); |
e4d050cb YX |
393 | memcpy(b->bcast_addr.value, dev->broadcast, b->media->hwaddr_len); |
394 | b->bcast_addr.media_id = b->media->type_id; | |
395 | b->bcast_addr.broadcast = 1; | |
396 | b->mtu = dev->mtu; | |
38504c28 | 397 | b->media->raw2addr(b, &b->addr, (char *)dev->dev_addr); |
e4d050cb YX |
398 | rcu_assign_pointer(dev->tipc_ptr, b); |
399 | return 0; | |
400 | } | |
401 | ||
38504c28 | 402 | /* tipc_disable_l2_media - detach TIPC bearer from an L2 interface |
e4d050cb | 403 | * |
38504c28 | 404 | * Mark L2 bearer as inactive so that incoming buffers are thrown away, |
e4d050cb YX |
405 | * then get worker thread to complete bearer cleanup. (Can't do cleanup |
406 | * here because cleanup code needs to sleep and caller holds spinlocks.) | |
407 | */ | |
408 | void tipc_disable_l2_media(struct tipc_bearer *b) | |
409 | { | |
2231c5af YX |
410 | struct net_device *dev; |
411 | ||
412 | dev = (struct net_device *)rtnl_dereference(b->media_ptr); | |
413 | RCU_INIT_POINTER(b->media_ptr, NULL); | |
e4d050cb | 414 | RCU_INIT_POINTER(dev->tipc_ptr, NULL); |
f1c8d8cb | 415 | synchronize_net(); |
e4d050cb YX |
416 | dev_put(dev); |
417 | } | |
418 | ||
419 | /** | |
38504c28 | 420 | * tipc_l2_send_msg - send a TIPC packet out over an L2 interface |
e4d050cb | 421 | * @buf: the packet to be sent |
963a1855 | 422 | * @b_ptr: the bearer through which the packet is to be sent |
e4d050cb YX |
423 | * @dest: peer destination address |
424 | */ | |
1da46568 YX |
425 | int tipc_l2_send_msg(struct net *net, struct sk_buff *buf, |
426 | struct tipc_bearer *b, struct tipc_media_addr *dest) | |
e4d050cb YX |
427 | { |
428 | struct sk_buff *clone; | |
2231c5af | 429 | struct net_device *dev; |
e4d050cb | 430 | int delta; |
2231c5af YX |
431 | |
432 | dev = (struct net_device *)rcu_dereference_rtnl(b->media_ptr); | |
433 | if (!dev) | |
434 | return 0; | |
e4d050cb YX |
435 | |
436 | clone = skb_clone(buf, GFP_ATOMIC); | |
437 | if (!clone) | |
438 | return 0; | |
439 | ||
440 | delta = dev->hard_header_len - skb_headroom(buf); | |
441 | if ((delta > 0) && | |
442 | pskb_expand_head(clone, SKB_DATA_ALIGN(delta), 0, GFP_ATOMIC)) { | |
443 | kfree_skb(clone); | |
444 | return 0; | |
445 | } | |
446 | ||
447 | skb_reset_network_header(clone); | |
448 | clone->dev = dev; | |
449 | clone->protocol = htons(ETH_P_TIPC); | |
450 | dev_hard_header(clone, dev, ETH_P_TIPC, dest->value, | |
451 | dev->dev_addr, clone->len); | |
452 | dev_queue_xmit(clone); | |
453 | return 0; | |
454 | } | |
455 | ||
456 | /* tipc_bearer_send- sends buffer to destination over bearer | |
457 | * | |
458 | * IMPORTANT: | |
459 | * The media send routine must not alter the buffer being passed in | |
460 | * as it may be needed for later retransmission! | |
461 | */ | |
7f9f95d9 | 462 | void tipc_bearer_send(struct net *net, u32 bearer_id, struct sk_buff *buf, |
e4d050cb YX |
463 | struct tipc_media_addr *dest) |
464 | { | |
7f9f95d9 | 465 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
7a2f7d18 YX |
466 | struct tipc_bearer *b_ptr; |
467 | ||
468 | rcu_read_lock(); | |
7f9f95d9 | 469 | b_ptr = rcu_dereference_rtnl(tn->bearer_list[bearer_id]); |
7a2f7d18 | 470 | if (likely(b_ptr)) |
1da46568 | 471 | b_ptr->media->send_msg(net, buf, b_ptr, dest); |
7a2f7d18 | 472 | rcu_read_unlock(); |
e4d050cb YX |
473 | } |
474 | ||
6e967adf YX |
475 | /** |
476 | * tipc_l2_rcv_msg - handle incoming TIPC message from an interface | |
477 | * @buf: the received packet | |
478 | * @dev: the net device that the packet was received on | |
479 | * @pt: the packet_type structure which was used to register this handler | |
480 | * @orig_dev: the original receive net device in case the device is a bond | |
481 | * | |
482 | * Accept only packets explicitly sent to this node, or broadcast packets; | |
483 | * ignores packets sent using interface multicast, and traffic sent to other | |
484 | * nodes (which can happen if interface is running in promiscuous mode). | |
485 | */ | |
486 | static int tipc_l2_rcv_msg(struct sk_buff *buf, struct net_device *dev, | |
487 | struct packet_type *pt, struct net_device *orig_dev) | |
488 | { | |
489 | struct tipc_bearer *b_ptr; | |
490 | ||
6e967adf | 491 | rcu_read_lock(); |
ca07fb07 | 492 | b_ptr = rcu_dereference_rtnl(dev->tipc_ptr); |
6e967adf YX |
493 | if (likely(b_ptr)) { |
494 | if (likely(buf->pkt_type <= PACKET_BROADCAST)) { | |
495 | buf->next = NULL; | |
c93d3baa | 496 | tipc_rcv(dev_net(dev), buf, b_ptr); |
6e967adf YX |
497 | rcu_read_unlock(); |
498 | return NET_RX_SUCCESS; | |
499 | } | |
500 | } | |
501 | rcu_read_unlock(); | |
502 | ||
503 | kfree_skb(buf); | |
504 | return NET_RX_DROP; | |
505 | } | |
506 | ||
507 | /** | |
508 | * tipc_l2_device_event - handle device events from network device | |
509 | * @nb: the context of the notification | |
510 | * @evt: the type of event | |
511 | * @ptr: the net device that the event was on | |
512 | * | |
513 | * This function is called by the Ethernet driver in case of link | |
514 | * change event. | |
515 | */ | |
516 | static int tipc_l2_device_event(struct notifier_block *nb, unsigned long evt, | |
517 | void *ptr) | |
518 | { | |
6e967adf | 519 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
c93d3baa YX |
520 | struct net *net = dev_net(dev); |
521 | struct tipc_bearer *b_ptr; | |
6e967adf | 522 | |
ca07fb07 YX |
523 | b_ptr = rtnl_dereference(dev->tipc_ptr); |
524 | if (!b_ptr) | |
6e967adf | 525 | return NOTIFY_DONE; |
6e967adf YX |
526 | |
527 | b_ptr->mtu = dev->mtu; | |
528 | ||
529 | switch (evt) { | |
530 | case NETDEV_CHANGE: | |
531 | if (netif_carrier_ok(dev)) | |
532 | break; | |
533 | case NETDEV_DOWN: | |
534 | case NETDEV_CHANGEMTU: | |
c93d3baa | 535 | tipc_reset_bearer(net, b_ptr); |
a21a584d | 536 | break; |
6e967adf | 537 | case NETDEV_CHANGEADDR: |
38504c28 | 538 | b_ptr->media->raw2addr(b_ptr, &b_ptr->addr, |
a21a584d | 539 | (char *)dev->dev_addr); |
c93d3baa | 540 | tipc_reset_bearer(net, b_ptr); |
6e967adf YX |
541 | break; |
542 | case NETDEV_UNREGISTER: | |
543 | case NETDEV_CHANGENAME: | |
f2f9800d | 544 | bearer_disable(dev_net(dev), b_ptr, false); |
6e967adf YX |
545 | break; |
546 | } | |
6e967adf YX |
547 | return NOTIFY_OK; |
548 | } | |
549 | ||
550 | static struct packet_type tipc_packet_type __read_mostly = { | |
184593c7 | 551 | .type = htons(ETH_P_TIPC), |
6e967adf YX |
552 | .func = tipc_l2_rcv_msg, |
553 | }; | |
554 | ||
555 | static struct notifier_block notifier = { | |
556 | .notifier_call = tipc_l2_device_event, | |
557 | .priority = 0, | |
558 | }; | |
559 | ||
560 | int tipc_bearer_setup(void) | |
561 | { | |
970122fd YX |
562 | int err; |
563 | ||
564 | err = register_netdevice_notifier(¬ifier); | |
565 | if (err) | |
566 | return err; | |
6e967adf | 567 | dev_add_pack(&tipc_packet_type); |
970122fd | 568 | return 0; |
6e967adf YX |
569 | } |
570 | ||
571 | void tipc_bearer_cleanup(void) | |
572 | { | |
573 | unregister_netdevice_notifier(¬ifier); | |
574 | dev_remove_pack(&tipc_packet_type); | |
575 | } | |
b97bf3fd | 576 | |
f2f9800d | 577 | void tipc_bearer_stop(struct net *net) |
b97bf3fd | 578 | { |
7f9f95d9 | 579 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
3874ccbb | 580 | struct tipc_bearer *b_ptr; |
b97bf3fd PL |
581 | u32 i; |
582 | ||
b97bf3fd | 583 | for (i = 0; i < MAX_BEARERS; i++) { |
7f9f95d9 | 584 | b_ptr = rtnl_dereference(tn->bearer_list[i]); |
f47de12b | 585 | if (b_ptr) { |
f2f9800d | 586 | bearer_disable(net, b_ptr, true); |
7f9f95d9 | 587 | tn->bearer_list[i] = NULL; |
3874ccbb | 588 | } |
b97bf3fd | 589 | } |
b97bf3fd | 590 | } |
0655f6a8 | 591 | |
35b9dd76 | 592 | /* Caller should hold rtnl_lock to protect the bearer */ |
d8182804 | 593 | static int __tipc_nl_add_bearer(struct tipc_nl_msg *msg, |
f2f67390 | 594 | struct tipc_bearer *bearer, int nlflags) |
35b9dd76 RA |
595 | { |
596 | void *hdr; | |
597 | struct nlattr *attrs; | |
598 | struct nlattr *prop; | |
599 | ||
bfb3e5dd | 600 | hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family, |
f2f67390 | 601 | nlflags, TIPC_NL_BEARER_GET); |
35b9dd76 RA |
602 | if (!hdr) |
603 | return -EMSGSIZE; | |
604 | ||
605 | attrs = nla_nest_start(msg->skb, TIPC_NLA_BEARER); | |
606 | if (!attrs) | |
607 | goto msg_full; | |
608 | ||
609 | if (nla_put_string(msg->skb, TIPC_NLA_BEARER_NAME, bearer->name)) | |
610 | goto attr_msg_full; | |
611 | ||
612 | prop = nla_nest_start(msg->skb, TIPC_NLA_BEARER_PROP); | |
613 | if (!prop) | |
614 | goto prop_msg_full; | |
615 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, bearer->priority)) | |
616 | goto prop_msg_full; | |
617 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, bearer->tolerance)) | |
618 | goto prop_msg_full; | |
619 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, bearer->window)) | |
620 | goto prop_msg_full; | |
621 | ||
622 | nla_nest_end(msg->skb, prop); | |
623 | nla_nest_end(msg->skb, attrs); | |
624 | genlmsg_end(msg->skb, hdr); | |
625 | ||
626 | return 0; | |
627 | ||
628 | prop_msg_full: | |
629 | nla_nest_cancel(msg->skb, prop); | |
630 | attr_msg_full: | |
631 | nla_nest_cancel(msg->skb, attrs); | |
632 | msg_full: | |
633 | genlmsg_cancel(msg->skb, hdr); | |
634 | ||
635 | return -EMSGSIZE; | |
636 | } | |
637 | ||
638 | int tipc_nl_bearer_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
639 | { | |
640 | int err; | |
641 | int i = cb->args[0]; | |
642 | struct tipc_bearer *bearer; | |
643 | struct tipc_nl_msg msg; | |
7f9f95d9 YX |
644 | struct net *net = sock_net(skb->sk); |
645 | struct tipc_net *tn = net_generic(net, tipc_net_id); | |
35b9dd76 RA |
646 | |
647 | if (i == MAX_BEARERS) | |
648 | return 0; | |
649 | ||
650 | msg.skb = skb; | |
651 | msg.portid = NETLINK_CB(cb->skb).portid; | |
652 | msg.seq = cb->nlh->nlmsg_seq; | |
653 | ||
654 | rtnl_lock(); | |
655 | for (i = 0; i < MAX_BEARERS; i++) { | |
7f9f95d9 | 656 | bearer = rtnl_dereference(tn->bearer_list[i]); |
35b9dd76 RA |
657 | if (!bearer) |
658 | continue; | |
659 | ||
f2f67390 | 660 | err = __tipc_nl_add_bearer(&msg, bearer, NLM_F_MULTI); |
35b9dd76 RA |
661 | if (err) |
662 | break; | |
663 | } | |
664 | rtnl_unlock(); | |
665 | ||
666 | cb->args[0] = i; | |
667 | return skb->len; | |
668 | } | |
669 | ||
670 | int tipc_nl_bearer_get(struct sk_buff *skb, struct genl_info *info) | |
671 | { | |
672 | int err; | |
673 | char *name; | |
674 | struct sk_buff *rep; | |
675 | struct tipc_bearer *bearer; | |
676 | struct tipc_nl_msg msg; | |
677 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
7f9f95d9 | 678 | struct net *net = genl_info_net(info); |
35b9dd76 RA |
679 | |
680 | if (!info->attrs[TIPC_NLA_BEARER]) | |
681 | return -EINVAL; | |
682 | ||
683 | err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX, | |
684 | info->attrs[TIPC_NLA_BEARER], | |
685 | tipc_nl_bearer_policy); | |
686 | if (err) | |
687 | return err; | |
688 | ||
689 | if (!attrs[TIPC_NLA_BEARER_NAME]) | |
690 | return -EINVAL; | |
691 | name = nla_data(attrs[TIPC_NLA_BEARER_NAME]); | |
692 | ||
693 | rep = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); | |
694 | if (!rep) | |
695 | return -ENOMEM; | |
696 | ||
697 | msg.skb = rep; | |
698 | msg.portid = info->snd_portid; | |
699 | msg.seq = info->snd_seq; | |
700 | ||
701 | rtnl_lock(); | |
7f9f95d9 | 702 | bearer = tipc_bearer_find(net, name); |
35b9dd76 RA |
703 | if (!bearer) { |
704 | err = -EINVAL; | |
705 | goto err_out; | |
706 | } | |
707 | ||
f2f67390 | 708 | err = __tipc_nl_add_bearer(&msg, bearer, 0); |
35b9dd76 RA |
709 | if (err) |
710 | goto err_out; | |
711 | rtnl_unlock(); | |
712 | ||
713 | return genlmsg_reply(rep, info); | |
714 | err_out: | |
715 | rtnl_unlock(); | |
716 | nlmsg_free(rep); | |
717 | ||
718 | return err; | |
719 | } | |
720 | ||
0655f6a8 RA |
721 | int tipc_nl_bearer_disable(struct sk_buff *skb, struct genl_info *info) |
722 | { | |
723 | int err; | |
724 | char *name; | |
725 | struct tipc_bearer *bearer; | |
726 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
9ab15465 | 727 | struct net *net = sock_net(skb->sk); |
0655f6a8 RA |
728 | |
729 | if (!info->attrs[TIPC_NLA_BEARER]) | |
730 | return -EINVAL; | |
731 | ||
732 | err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX, | |
733 | info->attrs[TIPC_NLA_BEARER], | |
734 | tipc_nl_bearer_policy); | |
735 | if (err) | |
736 | return err; | |
737 | ||
738 | if (!attrs[TIPC_NLA_BEARER_NAME]) | |
739 | return -EINVAL; | |
740 | ||
741 | name = nla_data(attrs[TIPC_NLA_BEARER_NAME]); | |
742 | ||
743 | rtnl_lock(); | |
7f9f95d9 | 744 | bearer = tipc_bearer_find(net, name); |
0655f6a8 RA |
745 | if (!bearer) { |
746 | rtnl_unlock(); | |
747 | return -EINVAL; | |
748 | } | |
749 | ||
169bf912 | 750 | bearer_disable(net, bearer, false); |
0655f6a8 RA |
751 | rtnl_unlock(); |
752 | ||
753 | return 0; | |
754 | } | |
755 | ||
756 | int tipc_nl_bearer_enable(struct sk_buff *skb, struct genl_info *info) | |
757 | { | |
758 | int err; | |
759 | char *bearer; | |
760 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
9ab15465 RA |
761 | struct net *net = sock_net(skb->sk); |
762 | struct tipc_net *tn = net_generic(net, tipc_net_id); | |
0655f6a8 RA |
763 | u32 domain; |
764 | u32 prio; | |
765 | ||
766 | prio = TIPC_MEDIA_LINK_PRI; | |
34747539 | 767 | domain = tn->own_addr & TIPC_CLUSTER_MASK; |
0655f6a8 RA |
768 | |
769 | if (!info->attrs[TIPC_NLA_BEARER]) | |
770 | return -EINVAL; | |
771 | ||
772 | err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX, | |
773 | info->attrs[TIPC_NLA_BEARER], | |
774 | tipc_nl_bearer_policy); | |
775 | if (err) | |
776 | return err; | |
777 | ||
778 | if (!attrs[TIPC_NLA_BEARER_NAME]) | |
779 | return -EINVAL; | |
780 | ||
781 | bearer = nla_data(attrs[TIPC_NLA_BEARER_NAME]); | |
782 | ||
783 | if (attrs[TIPC_NLA_BEARER_DOMAIN]) | |
784 | domain = nla_get_u32(attrs[TIPC_NLA_BEARER_DOMAIN]); | |
785 | ||
786 | if (attrs[TIPC_NLA_BEARER_PROP]) { | |
787 | struct nlattr *props[TIPC_NLA_PROP_MAX + 1]; | |
788 | ||
789 | err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_BEARER_PROP], | |
790 | props); | |
791 | if (err) | |
792 | return err; | |
793 | ||
794 | if (props[TIPC_NLA_PROP_PRIO]) | |
795 | prio = nla_get_u32(props[TIPC_NLA_PROP_PRIO]); | |
796 | } | |
797 | ||
798 | rtnl_lock(); | |
d0f91938 | 799 | err = tipc_enable_bearer(net, bearer, domain, prio, attrs); |
0655f6a8 RA |
800 | if (err) { |
801 | rtnl_unlock(); | |
802 | return err; | |
803 | } | |
804 | rtnl_unlock(); | |
805 | ||
806 | return 0; | |
807 | } | |
315c00bc RA |
808 | |
809 | int tipc_nl_bearer_set(struct sk_buff *skb, struct genl_info *info) | |
810 | { | |
811 | int err; | |
812 | char *name; | |
813 | struct tipc_bearer *b; | |
814 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
7f9f95d9 | 815 | struct net *net = genl_info_net(info); |
315c00bc RA |
816 | |
817 | if (!info->attrs[TIPC_NLA_BEARER]) | |
818 | return -EINVAL; | |
819 | ||
820 | err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX, | |
821 | info->attrs[TIPC_NLA_BEARER], | |
822 | tipc_nl_bearer_policy); | |
823 | if (err) | |
824 | return err; | |
825 | ||
826 | if (!attrs[TIPC_NLA_BEARER_NAME]) | |
827 | return -EINVAL; | |
828 | name = nla_data(attrs[TIPC_NLA_BEARER_NAME]); | |
829 | ||
830 | rtnl_lock(); | |
7f9f95d9 | 831 | b = tipc_bearer_find(net, name); |
315c00bc RA |
832 | if (!b) { |
833 | rtnl_unlock(); | |
834 | return -EINVAL; | |
835 | } | |
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 | rtnl_unlock(); | |
844 | return err; | |
845 | } | |
846 | ||
847 | if (props[TIPC_NLA_PROP_TOL]) | |
848 | b->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]); | |
849 | if (props[TIPC_NLA_PROP_PRIO]) | |
850 | b->priority = nla_get_u32(props[TIPC_NLA_PROP_PRIO]); | |
851 | if (props[TIPC_NLA_PROP_WIN]) | |
852 | b->window = nla_get_u32(props[TIPC_NLA_PROP_WIN]); | |
853 | } | |
854 | rtnl_unlock(); | |
855 | ||
856 | return 0; | |
857 | } | |
46f15c67 | 858 | |
d8182804 | 859 | static int __tipc_nl_add_media(struct tipc_nl_msg *msg, |
f2f67390 | 860 | struct tipc_media *media, int nlflags) |
46f15c67 RA |
861 | { |
862 | void *hdr; | |
863 | struct nlattr *attrs; | |
864 | struct nlattr *prop; | |
865 | ||
bfb3e5dd | 866 | hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family, |
f2f67390 | 867 | nlflags, TIPC_NL_MEDIA_GET); |
46f15c67 RA |
868 | if (!hdr) |
869 | return -EMSGSIZE; | |
870 | ||
871 | attrs = nla_nest_start(msg->skb, TIPC_NLA_MEDIA); | |
872 | if (!attrs) | |
873 | goto msg_full; | |
874 | ||
875 | if (nla_put_string(msg->skb, TIPC_NLA_MEDIA_NAME, media->name)) | |
876 | goto attr_msg_full; | |
877 | ||
878 | prop = nla_nest_start(msg->skb, TIPC_NLA_MEDIA_PROP); | |
879 | if (!prop) | |
880 | goto prop_msg_full; | |
881 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, media->priority)) | |
882 | goto prop_msg_full; | |
883 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, media->tolerance)) | |
884 | goto prop_msg_full; | |
885 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, media->window)) | |
886 | goto prop_msg_full; | |
887 | ||
888 | nla_nest_end(msg->skb, prop); | |
889 | nla_nest_end(msg->skb, attrs); | |
890 | genlmsg_end(msg->skb, hdr); | |
891 | ||
892 | return 0; | |
893 | ||
894 | prop_msg_full: | |
895 | nla_nest_cancel(msg->skb, prop); | |
896 | attr_msg_full: | |
897 | nla_nest_cancel(msg->skb, attrs); | |
898 | msg_full: | |
899 | genlmsg_cancel(msg->skb, hdr); | |
900 | ||
901 | return -EMSGSIZE; | |
902 | } | |
903 | ||
904 | int tipc_nl_media_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
905 | { | |
906 | int err; | |
907 | int i = cb->args[0]; | |
908 | struct tipc_nl_msg msg; | |
909 | ||
910 | if (i == MAX_MEDIA) | |
911 | return 0; | |
912 | ||
913 | msg.skb = skb; | |
914 | msg.portid = NETLINK_CB(cb->skb).portid; | |
915 | msg.seq = cb->nlh->nlmsg_seq; | |
916 | ||
917 | rtnl_lock(); | |
918 | for (; media_info_array[i] != NULL; i++) { | |
f2f67390 ND |
919 | err = __tipc_nl_add_media(&msg, media_info_array[i], |
920 | NLM_F_MULTI); | |
46f15c67 RA |
921 | if (err) |
922 | break; | |
923 | } | |
924 | rtnl_unlock(); | |
925 | ||
926 | cb->args[0] = i; | |
927 | return skb->len; | |
928 | } | |
929 | ||
930 | int tipc_nl_media_get(struct sk_buff *skb, struct genl_info *info) | |
931 | { | |
932 | int err; | |
933 | char *name; | |
934 | struct tipc_nl_msg msg; | |
935 | struct tipc_media *media; | |
936 | struct sk_buff *rep; | |
937 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
938 | ||
939 | if (!info->attrs[TIPC_NLA_MEDIA]) | |
940 | return -EINVAL; | |
941 | ||
942 | err = nla_parse_nested(attrs, TIPC_NLA_MEDIA_MAX, | |
943 | info->attrs[TIPC_NLA_MEDIA], | |
944 | tipc_nl_media_policy); | |
945 | if (err) | |
946 | return err; | |
947 | ||
948 | if (!attrs[TIPC_NLA_MEDIA_NAME]) | |
949 | return -EINVAL; | |
950 | name = nla_data(attrs[TIPC_NLA_MEDIA_NAME]); | |
951 | ||
952 | rep = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); | |
953 | if (!rep) | |
954 | return -ENOMEM; | |
955 | ||
956 | msg.skb = rep; | |
957 | msg.portid = info->snd_portid; | |
958 | msg.seq = info->snd_seq; | |
959 | ||
960 | rtnl_lock(); | |
961 | media = tipc_media_find(name); | |
962 | if (!media) { | |
963 | err = -EINVAL; | |
964 | goto err_out; | |
965 | } | |
966 | ||
f2f67390 | 967 | err = __tipc_nl_add_media(&msg, media, 0); |
46f15c67 RA |
968 | if (err) |
969 | goto err_out; | |
970 | rtnl_unlock(); | |
971 | ||
972 | return genlmsg_reply(rep, info); | |
973 | err_out: | |
974 | rtnl_unlock(); | |
975 | nlmsg_free(rep); | |
976 | ||
977 | return err; | |
978 | } | |
1e55417d RA |
979 | |
980 | int tipc_nl_media_set(struct sk_buff *skb, struct genl_info *info) | |
981 | { | |
982 | int err; | |
983 | char *name; | |
984 | struct tipc_media *m; | |
985 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
986 | ||
987 | if (!info->attrs[TIPC_NLA_MEDIA]) | |
988 | return -EINVAL; | |
989 | ||
990 | err = nla_parse_nested(attrs, TIPC_NLA_MEDIA_MAX, | |
991 | info->attrs[TIPC_NLA_MEDIA], | |
992 | tipc_nl_media_policy); | |
993 | ||
994 | if (!attrs[TIPC_NLA_MEDIA_NAME]) | |
995 | return -EINVAL; | |
996 | name = nla_data(attrs[TIPC_NLA_MEDIA_NAME]); | |
997 | ||
998 | rtnl_lock(); | |
999 | m = tipc_media_find(name); | |
1000 | if (!m) { | |
1001 | rtnl_unlock(); | |
1002 | return -EINVAL; | |
1003 | } | |
1004 | ||
1005 | if (attrs[TIPC_NLA_MEDIA_PROP]) { | |
1006 | struct nlattr *props[TIPC_NLA_PROP_MAX + 1]; | |
1007 | ||
1008 | err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_MEDIA_PROP], | |
1009 | props); | |
1010 | if (err) { | |
1011 | rtnl_unlock(); | |
1012 | return err; | |
1013 | } | |
1014 | ||
1015 | if (props[TIPC_NLA_PROP_TOL]) | |
1016 | m->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]); | |
1017 | if (props[TIPC_NLA_PROP_PRIO]) | |
1018 | m->priority = nla_get_u32(props[TIPC_NLA_PROP_PRIO]); | |
1019 | if (props[TIPC_NLA_PROP_WIN]) | |
1020 | m->window = nla_get_u32(props[TIPC_NLA_PROP_WIN]); | |
1021 | } | |
1022 | rtnl_unlock(); | |
1023 | ||
1024 | return 0; | |
1025 | } |