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 | ||
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 | ||
b1c29f6b | 74 | static void bearer_disable(struct net *net, struct tipc_bearer *b_ptr); |
3a777ff8 | 75 | |
b97bf3fd | 76 | /** |
5c216e1d | 77 | * tipc_media_find - locates specified media object by name |
b97bf3fd | 78 | */ |
358a0d1c | 79 | struct tipc_media *tipc_media_find(const char *name) |
b97bf3fd | 80 | { |
b97bf3fd PL |
81 | u32 i; |
82 | ||
ef72a7e0 JPM |
83 | for (i = 0; media_info_array[i] != NULL; i++) { |
84 | if (!strcmp(media_info_array[i]->name, name)) | |
5702dbab | 85 | break; |
b97bf3fd | 86 | } |
ef72a7e0 | 87 | return media_info_array[i]; |
b97bf3fd PL |
88 | } |
89 | ||
c79be454 AS |
90 | /** |
91 | * media_find_id - locates specified media object by type identifier | |
92 | */ | |
358a0d1c | 93 | static struct tipc_media *media_find_id(u8 type) |
c79be454 AS |
94 | { |
95 | u32 i; | |
96 | ||
ef72a7e0 JPM |
97 | for (i = 0; media_info_array[i] != NULL; i++) { |
98 | if (media_info_array[i]->type_id == type) | |
5702dbab | 99 | break; |
c79be454 | 100 | } |
ef72a7e0 | 101 | return media_info_array[i]; |
b97bf3fd PL |
102 | } |
103 | ||
104 | /** | |
4323add6 | 105 | * tipc_media_addr_printf - record media address in print buffer |
b97bf3fd | 106 | */ |
dc1aed37 | 107 | void tipc_media_addr_printf(char *buf, int len, struct tipc_media_addr *a) |
b97bf3fd | 108 | { |
c61b666e | 109 | char addr_str[MAX_ADDR_STR]; |
358a0d1c | 110 | struct tipc_media *m_ptr; |
dc1aed37 | 111 | int ret; |
b97bf3fd | 112 | |
3d749a6a | 113 | m_ptr = media_find_id(a->media_id); |
b97bf3fd | 114 | |
c61b666e | 115 | if (m_ptr && !m_ptr->addr2str(a, addr_str, sizeof(addr_str))) |
941787b8 | 116 | ret = scnprintf(buf, len, "%s(%s)", m_ptr->name, addr_str); |
c61b666e | 117 | else { |
c61b666e | 118 | u32 i; |
b97bf3fd | 119 | |
941787b8 | 120 | ret = scnprintf(buf, len, "UNKNOWN(%u)", a->media_id); |
3d749a6a | 121 | for (i = 0; i < sizeof(a->value); i++) |
941787b8 | 122 | ret += scnprintf(buf - ret, len + ret, |
dc1aed37 | 123 | "-%02x", a->value[i]); |
b97bf3fd PL |
124 | } |
125 | } | |
126 | ||
b97bf3fd PL |
127 | /** |
128 | * bearer_name_validate - validate & (optionally) deconstruct bearer name | |
2c53040f BH |
129 | * @name: ptr to bearer name string |
130 | * @name_parts: ptr to area for bearer name components (or NULL if not needed) | |
c4307285 | 131 | * |
b97bf3fd PL |
132 | * Returns 1 if bearer name is valid, otherwise 0. |
133 | */ | |
c4307285 | 134 | static int bearer_name_validate(const char *name, |
f19765f4 | 135 | struct tipc_bearer_names *name_parts) |
b97bf3fd PL |
136 | { |
137 | char name_copy[TIPC_MAX_BEARER_NAME]; | |
138 | char *media_name; | |
139 | char *if_name; | |
140 | u32 media_len; | |
141 | u32 if_len; | |
142 | ||
143 | /* copy bearer name & ensure length is OK */ | |
b97bf3fd PL |
144 | name_copy[TIPC_MAX_BEARER_NAME - 1] = 0; |
145 | /* need above in case non-Posix strncpy() doesn't pad with nulls */ | |
146 | strncpy(name_copy, name, TIPC_MAX_BEARER_NAME); | |
147 | if (name_copy[TIPC_MAX_BEARER_NAME - 1] != 0) | |
148 | return 0; | |
149 | ||
150 | /* ensure all component parts of bearer name are present */ | |
b97bf3fd | 151 | media_name = name_copy; |
2db9983a AS |
152 | if_name = strchr(media_name, ':'); |
153 | if (if_name == NULL) | |
b97bf3fd PL |
154 | return 0; |
155 | *(if_name++) = 0; | |
156 | media_len = if_name - media_name; | |
157 | if_len = strlen(if_name) + 1; | |
158 | ||
159 | /* validate component parts of bearer name */ | |
c4307285 | 160 | if ((media_len <= 1) || (media_len > TIPC_MAX_MEDIA_NAME) || |
fc073938 | 161 | (if_len <= 1) || (if_len > TIPC_MAX_IF_NAME)) |
b97bf3fd PL |
162 | return 0; |
163 | ||
164 | /* return bearer name components, if necessary */ | |
b97bf3fd PL |
165 | if (name_parts) { |
166 | strcpy(name_parts->media_name, media_name); | |
167 | strcpy(name_parts->if_name, if_name); | |
168 | } | |
169 | return 1; | |
170 | } | |
171 | ||
172 | /** | |
5c216e1d | 173 | * tipc_bearer_find - locates bearer object with matching bearer name |
b97bf3fd | 174 | */ |
7f9f95d9 | 175 | struct tipc_bearer *tipc_bearer_find(struct net *net, const char *name) |
b97bf3fd | 176 | { |
7f9f95d9 | 177 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
2d627b92 | 178 | struct tipc_bearer *b_ptr; |
b97bf3fd PL |
179 | u32 i; |
180 | ||
3874ccbb | 181 | for (i = 0; i < MAX_BEARERS; i++) { |
7f9f95d9 | 182 | b_ptr = rtnl_dereference(tn->bearer_list[i]); |
f47de12b | 183 | if (b_ptr && (!strcmp(b_ptr->name, name))) |
b97bf3fd PL |
184 | return b_ptr; |
185 | } | |
1fc54d8f | 186 | return NULL; |
b97bf3fd PL |
187 | } |
188 | ||
7f9f95d9 | 189 | void tipc_bearer_add_dest(struct net *net, u32 bearer_id, u32 dest) |
b97bf3fd | 190 | { |
7f9f95d9 | 191 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
7a2f7d18 YX |
192 | struct tipc_bearer *b_ptr; |
193 | ||
194 | rcu_read_lock(); | |
7f9f95d9 | 195 | b_ptr = rcu_dereference_rtnl(tn->bearer_list[bearer_id]); |
7a2f7d18 | 196 | if (b_ptr) { |
7f9f95d9 | 197 | tipc_bcbearer_sort(net, &b_ptr->nodes, dest, true); |
7a2f7d18 YX |
198 | tipc_disc_add_dest(b_ptr->link_req); |
199 | } | |
200 | rcu_read_unlock(); | |
b97bf3fd PL |
201 | } |
202 | ||
7f9f95d9 | 203 | void tipc_bearer_remove_dest(struct net *net, u32 bearer_id, u32 dest) |
b97bf3fd | 204 | { |
7f9f95d9 | 205 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
7a2f7d18 YX |
206 | struct tipc_bearer *b_ptr; |
207 | ||
208 | rcu_read_lock(); | |
7f9f95d9 | 209 | b_ptr = rcu_dereference_rtnl(tn->bearer_list[bearer_id]); |
7a2f7d18 | 210 | if (b_ptr) { |
7f9f95d9 | 211 | tipc_bcbearer_sort(net, &b_ptr->nodes, dest, false); |
7a2f7d18 YX |
212 | tipc_disc_remove_dest(b_ptr->link_req); |
213 | } | |
214 | rcu_read_unlock(); | |
b97bf3fd PL |
215 | } |
216 | ||
b97bf3fd PL |
217 | /** |
218 | * tipc_enable_bearer - enable bearer with the given name | |
c4307285 | 219 | */ |
9ab15465 | 220 | static int tipc_enable_bearer(struct net *net, const char *name, |
d0f91938 EH |
221 | u32 disc_domain, u32 priority, |
222 | struct nlattr *attr[]) | |
b97bf3fd | 223 | { |
7f9f95d9 | 224 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
2d627b92 | 225 | struct tipc_bearer *b_ptr; |
358a0d1c | 226 | struct tipc_media *m_ptr; |
f19765f4 | 227 | struct tipc_bearer_names b_names; |
b97bf3fd PL |
228 | char addr_string[16]; |
229 | u32 bearer_id; | |
230 | u32 with_this_prio; | |
231 | u32 i; | |
232 | int res = -EINVAL; | |
233 | ||
34747539 | 234 | if (!tn->own_addr) { |
2cf8aa19 EH |
235 | pr_warn("Bearer <%s> rejected, not supported in standalone mode\n", |
236 | name); | |
b97bf3fd | 237 | return -ENOPROTOOPT; |
a10bd924 | 238 | } |
f19765f4 | 239 | if (!bearer_name_validate(name, &b_names)) { |
2cf8aa19 | 240 | pr_warn("Bearer <%s> rejected, illegal name\n", name); |
16cb4b33 | 241 | return -EINVAL; |
a10bd924 | 242 | } |
66e019a6 | 243 | if (tipc_addr_domain_valid(disc_domain) && |
34747539 YX |
244 | (disc_domain != tn->own_addr)) { |
245 | if (tipc_in_scope(disc_domain, tn->own_addr)) { | |
246 | disc_domain = tn->own_addr & TIPC_CLUSTER_MASK; | |
66e019a6 | 247 | res = 0; /* accept any node in own cluster */ |
34747539 | 248 | } else if (in_own_cluster_exact(net, disc_domain)) |
66e019a6 AS |
249 | res = 0; /* accept specified node in own cluster */ |
250 | } | |
251 | if (res) { | |
2cf8aa19 EH |
252 | pr_warn("Bearer <%s> rejected, illegal discovery domain\n", |
253 | name); | |
a10bd924 AS |
254 | return -EINVAL; |
255 | } | |
9efde4a0 | 256 | if ((priority > TIPC_MAX_LINK_PRI) && |
a10bd924 | 257 | (priority != TIPC_MEDIA_LINK_PRI)) { |
2cf8aa19 | 258 | pr_warn("Bearer <%s> rejected, illegal priority\n", name); |
b97bf3fd | 259 | return -EINVAL; |
a10bd924 | 260 | } |
b97bf3fd | 261 | |
f19765f4 | 262 | m_ptr = tipc_media_find(b_names.media_name); |
b97bf3fd | 263 | if (!m_ptr) { |
2cf8aa19 EH |
264 | pr_warn("Bearer <%s> rejected, media <%s> not registered\n", |
265 | name, b_names.media_name); | |
7216cd94 | 266 | return -EINVAL; |
b97bf3fd | 267 | } |
16cb4b33 PL |
268 | |
269 | if (priority == TIPC_MEDIA_LINK_PRI) | |
b97bf3fd PL |
270 | priority = m_ptr->priority; |
271 | ||
272 | restart: | |
273 | bearer_id = MAX_BEARERS; | |
274 | with_this_prio = 1; | |
275 | for (i = MAX_BEARERS; i-- != 0; ) { | |
7f9f95d9 | 276 | b_ptr = rtnl_dereference(tn->bearer_list[i]); |
f47de12b | 277 | if (!b_ptr) { |
b97bf3fd PL |
278 | bearer_id = i; |
279 | continue; | |
280 | } | |
3874ccbb | 281 | if (!strcmp(name, b_ptr->name)) { |
2cf8aa19 EH |
282 | pr_warn("Bearer <%s> rejected, already enabled\n", |
283 | name); | |
7216cd94 | 284 | return -EINVAL; |
b97bf3fd | 285 | } |
3874ccbb | 286 | if ((b_ptr->priority == priority) && |
b97bf3fd PL |
287 | (++with_this_prio > 2)) { |
288 | if (priority-- == 0) { | |
2cf8aa19 EH |
289 | pr_warn("Bearer <%s> rejected, duplicate priority\n", |
290 | name); | |
7216cd94 | 291 | return -EINVAL; |
b97bf3fd | 292 | } |
2cf8aa19 EH |
293 | pr_warn("Bearer <%s> priority adjustment required %u->%u\n", |
294 | name, priority + 1, priority); | |
b97bf3fd PL |
295 | goto restart; |
296 | } | |
297 | } | |
298 | if (bearer_id >= MAX_BEARERS) { | |
2cf8aa19 EH |
299 | pr_warn("Bearer <%s> rejected, bearer limit reached (%u)\n", |
300 | name, MAX_BEARERS); | |
7216cd94 | 301 | return -EINVAL; |
b97bf3fd PL |
302 | } |
303 | ||
3874ccbb | 304 | b_ptr = kzalloc(sizeof(*b_ptr), GFP_ATOMIC); |
7216cd94 YX |
305 | if (!b_ptr) |
306 | return -ENOMEM; | |
307 | ||
2d627b92 | 308 | strcpy(b_ptr->name, name); |
e4d050cb | 309 | b_ptr->media = m_ptr; |
d0f91938 | 310 | res = m_ptr->enable_media(net, b_ptr, attr); |
b97bf3fd | 311 | if (res) { |
2cf8aa19 EH |
312 | pr_warn("Bearer <%s> rejected, enable failure (%d)\n", |
313 | name, -res); | |
7216cd94 | 314 | return -EINVAL; |
b97bf3fd PL |
315 | } |
316 | ||
317 | b_ptr->identity = bearer_id; | |
5c216e1d AS |
318 | b_ptr->tolerance = m_ptr->tolerance; |
319 | b_ptr->window = m_ptr->window; | |
a21a584d | 320 | b_ptr->domain = disc_domain; |
b97bf3fd | 321 | b_ptr->net_plane = bearer_id + 'A'; |
b97bf3fd | 322 | b_ptr->priority = priority; |
3a777ff8 | 323 | |
c93d3baa | 324 | res = tipc_disc_create(net, b_ptr, &b_ptr->bcast_addr); |
3a777ff8 | 325 | if (res) { |
b1c29f6b | 326 | bearer_disable(net, b_ptr); |
2cf8aa19 EH |
327 | pr_warn("Bearer <%s> rejected, discovery object creation failed\n", |
328 | name); | |
7216cd94 | 329 | return -EINVAL; |
3a777ff8 | 330 | } |
3874ccbb | 331 | |
7f9f95d9 | 332 | rcu_assign_pointer(tn->bearer_list[bearer_id], b_ptr); |
3874ccbb | 333 | |
2cf8aa19 EH |
334 | pr_info("Enabled bearer <%s>, discovery domain %s, priority %u\n", |
335 | name, | |
336 | tipc_addr_string_fill(addr_string, disc_domain), priority); | |
b97bf3fd PL |
337 | return res; |
338 | } | |
339 | ||
340 | /** | |
512137ee | 341 | * tipc_reset_bearer - Reset all links established over this bearer |
b97bf3fd | 342 | */ |
c93d3baa | 343 | static int tipc_reset_bearer(struct net *net, struct tipc_bearer *b_ptr) |
b97bf3fd | 344 | { |
512137ee | 345 | pr_info("Resetting bearer <%s>\n", b_ptr->name); |
6144a996 | 346 | tipc_node_delete_links(net, b_ptr->identity); |
c93d3baa | 347 | tipc_disc_reset(net, b_ptr); |
0e35fd5e | 348 | return 0; |
b97bf3fd PL |
349 | } |
350 | ||
351 | /** | |
617d3c7a | 352 | * bearer_disable |
c4307285 | 353 | * |
7216cd94 | 354 | * Note: This routine assumes caller holds RTNL lock. |
b97bf3fd | 355 | */ |
b1c29f6b | 356 | static void bearer_disable(struct net *net, struct tipc_bearer *b_ptr) |
b97bf3fd | 357 | { |
7f9f95d9 | 358 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
3874ccbb YX |
359 | u32 i; |
360 | ||
2cf8aa19 | 361 | pr_info("Disabling bearer <%s>\n", b_ptr->name); |
4babbaa8 | 362 | b_ptr->media->disable_media(b_ptr); |
d4cca39d | 363 | |
6144a996 | 364 | tipc_node_delete_links(net, b_ptr->identity); |
a8304529 YX |
365 | if (b_ptr->link_req) |
366 | tipc_disc_delete(b_ptr->link_req); | |
3874ccbb YX |
367 | |
368 | for (i = 0; i < MAX_BEARERS; i++) { | |
7f9f95d9 YX |
369 | if (b_ptr == rtnl_dereference(tn->bearer_list[i])) { |
370 | RCU_INIT_POINTER(tn->bearer_list[i], NULL); | |
3874ccbb YX |
371 | break; |
372 | } | |
373 | } | |
f8322dfc | 374 | kfree_rcu(b_ptr, rcu); |
b97bf3fd PL |
375 | } |
376 | ||
d0f91938 EH |
377 | int tipc_enable_l2_media(struct net *net, struct tipc_bearer *b, |
378 | struct nlattr *attr[]) | |
e4d050cb YX |
379 | { |
380 | struct net_device *dev; | |
381 | char *driver_name = strchr((const char *)b->name, ':') + 1; | |
382 | ||
383 | /* Find device with specified name */ | |
7f9f95d9 | 384 | dev = dev_get_by_name(net, driver_name); |
e4d050cb YX |
385 | if (!dev) |
386 | return -ENODEV; | |
387 | ||
38504c28 | 388 | /* Associate TIPC bearer with L2 bearer */ |
2231c5af | 389 | rcu_assign_pointer(b->media_ptr, dev); |
38504c28 | 390 | memset(&b->bcast_addr, 0, sizeof(b->bcast_addr)); |
e4d050cb YX |
391 | memcpy(b->bcast_addr.value, dev->broadcast, b->media->hwaddr_len); |
392 | b->bcast_addr.media_id = b->media->type_id; | |
393 | b->bcast_addr.broadcast = 1; | |
394 | b->mtu = dev->mtu; | |
38504c28 | 395 | b->media->raw2addr(b, &b->addr, (char *)dev->dev_addr); |
e4d050cb YX |
396 | rcu_assign_pointer(dev->tipc_ptr, b); |
397 | return 0; | |
398 | } | |
399 | ||
38504c28 | 400 | /* tipc_disable_l2_media - detach TIPC bearer from an L2 interface |
e4d050cb | 401 | * |
38504c28 | 402 | * Mark L2 bearer as inactive so that incoming buffers are thrown away, |
e4d050cb YX |
403 | * then get worker thread to complete bearer cleanup. (Can't do cleanup |
404 | * here because cleanup code needs to sleep and caller holds spinlocks.) | |
405 | */ | |
406 | void tipc_disable_l2_media(struct tipc_bearer *b) | |
407 | { | |
2231c5af YX |
408 | struct net_device *dev; |
409 | ||
410 | dev = (struct net_device *)rtnl_dereference(b->media_ptr); | |
411 | RCU_INIT_POINTER(b->media_ptr, NULL); | |
e4d050cb | 412 | RCU_INIT_POINTER(dev->tipc_ptr, NULL); |
f1c8d8cb | 413 | synchronize_net(); |
e4d050cb YX |
414 | dev_put(dev); |
415 | } | |
416 | ||
417 | /** | |
38504c28 | 418 | * tipc_l2_send_msg - send a TIPC packet out over an L2 interface |
e4d050cb | 419 | * @buf: the packet to be sent |
963a1855 | 420 | * @b_ptr: the bearer through which the packet is to be sent |
e4d050cb YX |
421 | * @dest: peer destination address |
422 | */ | |
1da46568 YX |
423 | int tipc_l2_send_msg(struct net *net, struct sk_buff *buf, |
424 | struct tipc_bearer *b, struct tipc_media_addr *dest) | |
e4d050cb YX |
425 | { |
426 | struct sk_buff *clone; | |
2231c5af | 427 | struct net_device *dev; |
e4d050cb | 428 | int delta; |
2231c5af YX |
429 | |
430 | dev = (struct net_device *)rcu_dereference_rtnl(b->media_ptr); | |
431 | if (!dev) | |
432 | return 0; | |
e4d050cb YX |
433 | |
434 | clone = skb_clone(buf, GFP_ATOMIC); | |
435 | if (!clone) | |
436 | return 0; | |
437 | ||
438 | delta = dev->hard_header_len - skb_headroom(buf); | |
439 | if ((delta > 0) && | |
440 | pskb_expand_head(clone, SKB_DATA_ALIGN(delta), 0, GFP_ATOMIC)) { | |
441 | kfree_skb(clone); | |
442 | return 0; | |
443 | } | |
444 | ||
445 | skb_reset_network_header(clone); | |
446 | clone->dev = dev; | |
447 | clone->protocol = htons(ETH_P_TIPC); | |
448 | dev_hard_header(clone, dev, ETH_P_TIPC, dest->value, | |
449 | dev->dev_addr, clone->len); | |
450 | dev_queue_xmit(clone); | |
451 | return 0; | |
452 | } | |
453 | ||
454 | /* tipc_bearer_send- sends buffer to destination over bearer | |
455 | * | |
456 | * IMPORTANT: | |
457 | * The media send routine must not alter the buffer being passed in | |
458 | * as it may be needed for later retransmission! | |
459 | */ | |
7f9f95d9 | 460 | void tipc_bearer_send(struct net *net, u32 bearer_id, struct sk_buff *buf, |
e4d050cb YX |
461 | struct tipc_media_addr *dest) |
462 | { | |
7f9f95d9 | 463 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
7a2f7d18 YX |
464 | struct tipc_bearer *b_ptr; |
465 | ||
466 | rcu_read_lock(); | |
7f9f95d9 | 467 | b_ptr = rcu_dereference_rtnl(tn->bearer_list[bearer_id]); |
7a2f7d18 | 468 | if (likely(b_ptr)) |
1da46568 | 469 | b_ptr->media->send_msg(net, buf, b_ptr, dest); |
7a2f7d18 | 470 | rcu_read_unlock(); |
e4d050cb YX |
471 | } |
472 | ||
af9b028e JPM |
473 | /* tipc_bearer_xmit() -send buffer to destination over bearer |
474 | */ | |
475 | void tipc_bearer_xmit(struct net *net, u32 bearer_id, | |
476 | struct sk_buff_head *xmitq, | |
477 | struct tipc_media_addr *dst) | |
478 | { | |
479 | struct tipc_net *tn = net_generic(net, tipc_net_id); | |
480 | struct tipc_bearer *b; | |
481 | struct sk_buff *skb, *tmp; | |
482 | ||
483 | if (skb_queue_empty(xmitq)) | |
484 | return; | |
485 | ||
486 | rcu_read_lock(); | |
487 | b = rcu_dereference_rtnl(tn->bearer_list[bearer_id]); | |
488 | if (likely(b)) { | |
489 | skb_queue_walk_safe(xmitq, skb, tmp) { | |
490 | __skb_dequeue(xmitq); | |
491 | b->media->send_msg(net, skb, b, dst); | |
492 | /* Until we remove cloning in tipc_l2_send_msg(): */ | |
493 | kfree_skb(skb); | |
494 | } | |
495 | } | |
496 | rcu_read_unlock(); | |
497 | } | |
498 | ||
6e967adf YX |
499 | /** |
500 | * tipc_l2_rcv_msg - handle incoming TIPC message from an interface | |
501 | * @buf: the received packet | |
502 | * @dev: the net device that the packet was received on | |
503 | * @pt: the packet_type structure which was used to register this handler | |
504 | * @orig_dev: the original receive net device in case the device is a bond | |
505 | * | |
506 | * Accept only packets explicitly sent to this node, or broadcast packets; | |
507 | * ignores packets sent using interface multicast, and traffic sent to other | |
508 | * nodes (which can happen if interface is running in promiscuous mode). | |
509 | */ | |
510 | static int tipc_l2_rcv_msg(struct sk_buff *buf, struct net_device *dev, | |
511 | struct packet_type *pt, struct net_device *orig_dev) | |
512 | { | |
513 | struct tipc_bearer *b_ptr; | |
514 | ||
6e967adf | 515 | rcu_read_lock(); |
ca07fb07 | 516 | b_ptr = rcu_dereference_rtnl(dev->tipc_ptr); |
6e967adf YX |
517 | if (likely(b_ptr)) { |
518 | if (likely(buf->pkt_type <= PACKET_BROADCAST)) { | |
519 | buf->next = NULL; | |
c93d3baa | 520 | tipc_rcv(dev_net(dev), buf, b_ptr); |
6e967adf YX |
521 | rcu_read_unlock(); |
522 | return NET_RX_SUCCESS; | |
523 | } | |
524 | } | |
525 | rcu_read_unlock(); | |
526 | ||
527 | kfree_skb(buf); | |
528 | return NET_RX_DROP; | |
529 | } | |
530 | ||
531 | /** | |
532 | * tipc_l2_device_event - handle device events from network device | |
533 | * @nb: the context of the notification | |
534 | * @evt: the type of event | |
535 | * @ptr: the net device that the event was on | |
536 | * | |
537 | * This function is called by the Ethernet driver in case of link | |
538 | * change event. | |
539 | */ | |
540 | static int tipc_l2_device_event(struct notifier_block *nb, unsigned long evt, | |
541 | void *ptr) | |
542 | { | |
6e967adf | 543 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
c93d3baa YX |
544 | struct net *net = dev_net(dev); |
545 | struct tipc_bearer *b_ptr; | |
6e967adf | 546 | |
ca07fb07 YX |
547 | b_ptr = rtnl_dereference(dev->tipc_ptr); |
548 | if (!b_ptr) | |
6e967adf | 549 | return NOTIFY_DONE; |
6e967adf YX |
550 | |
551 | b_ptr->mtu = dev->mtu; | |
552 | ||
553 | switch (evt) { | |
554 | case NETDEV_CHANGE: | |
555 | if (netif_carrier_ok(dev)) | |
556 | break; | |
557 | case NETDEV_DOWN: | |
558 | case NETDEV_CHANGEMTU: | |
c93d3baa | 559 | tipc_reset_bearer(net, b_ptr); |
a21a584d | 560 | break; |
6e967adf | 561 | case NETDEV_CHANGEADDR: |
38504c28 | 562 | b_ptr->media->raw2addr(b_ptr, &b_ptr->addr, |
a21a584d | 563 | (char *)dev->dev_addr); |
c93d3baa | 564 | tipc_reset_bearer(net, b_ptr); |
6e967adf YX |
565 | break; |
566 | case NETDEV_UNREGISTER: | |
567 | case NETDEV_CHANGENAME: | |
b1c29f6b | 568 | bearer_disable(dev_net(dev), b_ptr); |
6e967adf YX |
569 | break; |
570 | } | |
6e967adf YX |
571 | return NOTIFY_OK; |
572 | } | |
573 | ||
574 | static struct packet_type tipc_packet_type __read_mostly = { | |
184593c7 | 575 | .type = htons(ETH_P_TIPC), |
6e967adf YX |
576 | .func = tipc_l2_rcv_msg, |
577 | }; | |
578 | ||
579 | static struct notifier_block notifier = { | |
580 | .notifier_call = tipc_l2_device_event, | |
581 | .priority = 0, | |
582 | }; | |
583 | ||
584 | int tipc_bearer_setup(void) | |
585 | { | |
970122fd YX |
586 | int err; |
587 | ||
588 | err = register_netdevice_notifier(¬ifier); | |
589 | if (err) | |
590 | return err; | |
6e967adf | 591 | dev_add_pack(&tipc_packet_type); |
970122fd | 592 | return 0; |
6e967adf YX |
593 | } |
594 | ||
595 | void tipc_bearer_cleanup(void) | |
596 | { | |
597 | unregister_netdevice_notifier(¬ifier); | |
598 | dev_remove_pack(&tipc_packet_type); | |
599 | } | |
b97bf3fd | 600 | |
f2f9800d | 601 | void tipc_bearer_stop(struct net *net) |
b97bf3fd | 602 | { |
7f9f95d9 | 603 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
3874ccbb | 604 | struct tipc_bearer *b_ptr; |
b97bf3fd PL |
605 | u32 i; |
606 | ||
b97bf3fd | 607 | for (i = 0; i < MAX_BEARERS; i++) { |
7f9f95d9 | 608 | b_ptr = rtnl_dereference(tn->bearer_list[i]); |
f47de12b | 609 | if (b_ptr) { |
b1c29f6b | 610 | bearer_disable(net, b_ptr); |
7f9f95d9 | 611 | tn->bearer_list[i] = NULL; |
3874ccbb | 612 | } |
b97bf3fd | 613 | } |
b97bf3fd | 614 | } |
0655f6a8 | 615 | |
35b9dd76 | 616 | /* Caller should hold rtnl_lock to protect the bearer */ |
d8182804 | 617 | static int __tipc_nl_add_bearer(struct tipc_nl_msg *msg, |
f2f67390 | 618 | struct tipc_bearer *bearer, int nlflags) |
35b9dd76 RA |
619 | { |
620 | void *hdr; | |
621 | struct nlattr *attrs; | |
622 | struct nlattr *prop; | |
623 | ||
bfb3e5dd | 624 | hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family, |
f2f67390 | 625 | nlflags, TIPC_NL_BEARER_GET); |
35b9dd76 RA |
626 | if (!hdr) |
627 | return -EMSGSIZE; | |
628 | ||
629 | attrs = nla_nest_start(msg->skb, TIPC_NLA_BEARER); | |
630 | if (!attrs) | |
631 | goto msg_full; | |
632 | ||
633 | if (nla_put_string(msg->skb, TIPC_NLA_BEARER_NAME, bearer->name)) | |
634 | goto attr_msg_full; | |
635 | ||
636 | prop = nla_nest_start(msg->skb, TIPC_NLA_BEARER_PROP); | |
637 | if (!prop) | |
638 | goto prop_msg_full; | |
639 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, bearer->priority)) | |
640 | goto prop_msg_full; | |
641 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, bearer->tolerance)) | |
642 | goto prop_msg_full; | |
643 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, bearer->window)) | |
644 | goto prop_msg_full; | |
645 | ||
646 | nla_nest_end(msg->skb, prop); | |
647 | nla_nest_end(msg->skb, attrs); | |
648 | genlmsg_end(msg->skb, hdr); | |
649 | ||
650 | return 0; | |
651 | ||
652 | prop_msg_full: | |
653 | nla_nest_cancel(msg->skb, prop); | |
654 | attr_msg_full: | |
655 | nla_nest_cancel(msg->skb, attrs); | |
656 | msg_full: | |
657 | genlmsg_cancel(msg->skb, hdr); | |
658 | ||
659 | return -EMSGSIZE; | |
660 | } | |
661 | ||
662 | int tipc_nl_bearer_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
663 | { | |
664 | int err; | |
665 | int i = cb->args[0]; | |
666 | struct tipc_bearer *bearer; | |
667 | struct tipc_nl_msg msg; | |
7f9f95d9 YX |
668 | struct net *net = sock_net(skb->sk); |
669 | struct tipc_net *tn = net_generic(net, tipc_net_id); | |
35b9dd76 RA |
670 | |
671 | if (i == MAX_BEARERS) | |
672 | return 0; | |
673 | ||
674 | msg.skb = skb; | |
675 | msg.portid = NETLINK_CB(cb->skb).portid; | |
676 | msg.seq = cb->nlh->nlmsg_seq; | |
677 | ||
678 | rtnl_lock(); | |
679 | for (i = 0; i < MAX_BEARERS; i++) { | |
7f9f95d9 | 680 | bearer = rtnl_dereference(tn->bearer_list[i]); |
35b9dd76 RA |
681 | if (!bearer) |
682 | continue; | |
683 | ||
f2f67390 | 684 | err = __tipc_nl_add_bearer(&msg, bearer, NLM_F_MULTI); |
35b9dd76 RA |
685 | if (err) |
686 | break; | |
687 | } | |
688 | rtnl_unlock(); | |
689 | ||
690 | cb->args[0] = i; | |
691 | return skb->len; | |
692 | } | |
693 | ||
694 | int tipc_nl_bearer_get(struct sk_buff *skb, struct genl_info *info) | |
695 | { | |
696 | int err; | |
697 | char *name; | |
698 | struct sk_buff *rep; | |
699 | struct tipc_bearer *bearer; | |
700 | struct tipc_nl_msg msg; | |
701 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
7f9f95d9 | 702 | struct net *net = genl_info_net(info); |
35b9dd76 RA |
703 | |
704 | if (!info->attrs[TIPC_NLA_BEARER]) | |
705 | return -EINVAL; | |
706 | ||
707 | err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX, | |
708 | info->attrs[TIPC_NLA_BEARER], | |
709 | tipc_nl_bearer_policy); | |
710 | if (err) | |
711 | return err; | |
712 | ||
713 | if (!attrs[TIPC_NLA_BEARER_NAME]) | |
714 | return -EINVAL; | |
715 | name = nla_data(attrs[TIPC_NLA_BEARER_NAME]); | |
716 | ||
717 | rep = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); | |
718 | if (!rep) | |
719 | return -ENOMEM; | |
720 | ||
721 | msg.skb = rep; | |
722 | msg.portid = info->snd_portid; | |
723 | msg.seq = info->snd_seq; | |
724 | ||
725 | rtnl_lock(); | |
7f9f95d9 | 726 | bearer = tipc_bearer_find(net, name); |
35b9dd76 RA |
727 | if (!bearer) { |
728 | err = -EINVAL; | |
729 | goto err_out; | |
730 | } | |
731 | ||
f2f67390 | 732 | err = __tipc_nl_add_bearer(&msg, bearer, 0); |
35b9dd76 RA |
733 | if (err) |
734 | goto err_out; | |
735 | rtnl_unlock(); | |
736 | ||
737 | return genlmsg_reply(rep, info); | |
738 | err_out: | |
739 | rtnl_unlock(); | |
740 | nlmsg_free(rep); | |
741 | ||
742 | return err; | |
743 | } | |
744 | ||
0655f6a8 RA |
745 | int tipc_nl_bearer_disable(struct sk_buff *skb, struct genl_info *info) |
746 | { | |
747 | int err; | |
748 | char *name; | |
749 | struct tipc_bearer *bearer; | |
750 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
9ab15465 | 751 | struct net *net = sock_net(skb->sk); |
0655f6a8 RA |
752 | |
753 | if (!info->attrs[TIPC_NLA_BEARER]) | |
754 | return -EINVAL; | |
755 | ||
756 | err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX, | |
757 | info->attrs[TIPC_NLA_BEARER], | |
758 | tipc_nl_bearer_policy); | |
759 | if (err) | |
760 | return err; | |
761 | ||
762 | if (!attrs[TIPC_NLA_BEARER_NAME]) | |
763 | return -EINVAL; | |
764 | ||
765 | name = nla_data(attrs[TIPC_NLA_BEARER_NAME]); | |
766 | ||
767 | rtnl_lock(); | |
7f9f95d9 | 768 | bearer = tipc_bearer_find(net, name); |
0655f6a8 RA |
769 | if (!bearer) { |
770 | rtnl_unlock(); | |
771 | return -EINVAL; | |
772 | } | |
773 | ||
b1c29f6b | 774 | bearer_disable(net, bearer); |
0655f6a8 RA |
775 | rtnl_unlock(); |
776 | ||
777 | return 0; | |
778 | } | |
779 | ||
780 | int tipc_nl_bearer_enable(struct sk_buff *skb, struct genl_info *info) | |
781 | { | |
782 | int err; | |
783 | char *bearer; | |
784 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
9ab15465 RA |
785 | struct net *net = sock_net(skb->sk); |
786 | struct tipc_net *tn = net_generic(net, tipc_net_id); | |
0655f6a8 RA |
787 | u32 domain; |
788 | u32 prio; | |
789 | ||
790 | prio = TIPC_MEDIA_LINK_PRI; | |
34747539 | 791 | domain = tn->own_addr & TIPC_CLUSTER_MASK; |
0655f6a8 RA |
792 | |
793 | if (!info->attrs[TIPC_NLA_BEARER]) | |
794 | return -EINVAL; | |
795 | ||
796 | err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX, | |
797 | info->attrs[TIPC_NLA_BEARER], | |
798 | tipc_nl_bearer_policy); | |
799 | if (err) | |
800 | return err; | |
801 | ||
802 | if (!attrs[TIPC_NLA_BEARER_NAME]) | |
803 | return -EINVAL; | |
804 | ||
805 | bearer = nla_data(attrs[TIPC_NLA_BEARER_NAME]); | |
806 | ||
807 | if (attrs[TIPC_NLA_BEARER_DOMAIN]) | |
808 | domain = nla_get_u32(attrs[TIPC_NLA_BEARER_DOMAIN]); | |
809 | ||
810 | if (attrs[TIPC_NLA_BEARER_PROP]) { | |
811 | struct nlattr *props[TIPC_NLA_PROP_MAX + 1]; | |
812 | ||
813 | err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_BEARER_PROP], | |
814 | props); | |
815 | if (err) | |
816 | return err; | |
817 | ||
818 | if (props[TIPC_NLA_PROP_PRIO]) | |
819 | prio = nla_get_u32(props[TIPC_NLA_PROP_PRIO]); | |
820 | } | |
821 | ||
822 | rtnl_lock(); | |
d0f91938 | 823 | err = tipc_enable_bearer(net, bearer, domain, prio, attrs); |
0655f6a8 RA |
824 | if (err) { |
825 | rtnl_unlock(); | |
826 | return err; | |
827 | } | |
828 | rtnl_unlock(); | |
829 | ||
830 | return 0; | |
831 | } | |
315c00bc RA |
832 | |
833 | int tipc_nl_bearer_set(struct sk_buff *skb, struct genl_info *info) | |
834 | { | |
835 | int err; | |
836 | char *name; | |
837 | struct tipc_bearer *b; | |
838 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
c3d6fb85 | 839 | struct net *net = sock_net(skb->sk); |
315c00bc RA |
840 | |
841 | if (!info->attrs[TIPC_NLA_BEARER]) | |
842 | return -EINVAL; | |
843 | ||
844 | err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX, | |
845 | info->attrs[TIPC_NLA_BEARER], | |
846 | tipc_nl_bearer_policy); | |
847 | if (err) | |
848 | return err; | |
849 | ||
850 | if (!attrs[TIPC_NLA_BEARER_NAME]) | |
851 | return -EINVAL; | |
852 | name = nla_data(attrs[TIPC_NLA_BEARER_NAME]); | |
853 | ||
854 | rtnl_lock(); | |
7f9f95d9 | 855 | b = tipc_bearer_find(net, name); |
315c00bc RA |
856 | if (!b) { |
857 | rtnl_unlock(); | |
858 | return -EINVAL; | |
859 | } | |
860 | ||
861 | if (attrs[TIPC_NLA_BEARER_PROP]) { | |
862 | struct nlattr *props[TIPC_NLA_PROP_MAX + 1]; | |
863 | ||
864 | err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_BEARER_PROP], | |
865 | props); | |
866 | if (err) { | |
867 | rtnl_unlock(); | |
868 | return err; | |
869 | } | |
870 | ||
871 | if (props[TIPC_NLA_PROP_TOL]) | |
872 | b->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]); | |
873 | if (props[TIPC_NLA_PROP_PRIO]) | |
874 | b->priority = nla_get_u32(props[TIPC_NLA_PROP_PRIO]); | |
875 | if (props[TIPC_NLA_PROP_WIN]) | |
876 | b->window = nla_get_u32(props[TIPC_NLA_PROP_WIN]); | |
877 | } | |
878 | rtnl_unlock(); | |
879 | ||
880 | return 0; | |
881 | } | |
46f15c67 | 882 | |
d8182804 | 883 | static int __tipc_nl_add_media(struct tipc_nl_msg *msg, |
f2f67390 | 884 | struct tipc_media *media, int nlflags) |
46f15c67 RA |
885 | { |
886 | void *hdr; | |
887 | struct nlattr *attrs; | |
888 | struct nlattr *prop; | |
889 | ||
bfb3e5dd | 890 | hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family, |
f2f67390 | 891 | nlflags, TIPC_NL_MEDIA_GET); |
46f15c67 RA |
892 | if (!hdr) |
893 | return -EMSGSIZE; | |
894 | ||
895 | attrs = nla_nest_start(msg->skb, TIPC_NLA_MEDIA); | |
896 | if (!attrs) | |
897 | goto msg_full; | |
898 | ||
899 | if (nla_put_string(msg->skb, TIPC_NLA_MEDIA_NAME, media->name)) | |
900 | goto attr_msg_full; | |
901 | ||
902 | prop = nla_nest_start(msg->skb, TIPC_NLA_MEDIA_PROP); | |
903 | if (!prop) | |
904 | goto prop_msg_full; | |
905 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, media->priority)) | |
906 | goto prop_msg_full; | |
907 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, media->tolerance)) | |
908 | goto prop_msg_full; | |
909 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, media->window)) | |
910 | goto prop_msg_full; | |
911 | ||
912 | nla_nest_end(msg->skb, prop); | |
913 | nla_nest_end(msg->skb, attrs); | |
914 | genlmsg_end(msg->skb, hdr); | |
915 | ||
916 | return 0; | |
917 | ||
918 | prop_msg_full: | |
919 | nla_nest_cancel(msg->skb, prop); | |
920 | attr_msg_full: | |
921 | nla_nest_cancel(msg->skb, attrs); | |
922 | msg_full: | |
923 | genlmsg_cancel(msg->skb, hdr); | |
924 | ||
925 | return -EMSGSIZE; | |
926 | } | |
927 | ||
928 | int tipc_nl_media_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
929 | { | |
930 | int err; | |
931 | int i = cb->args[0]; | |
932 | struct tipc_nl_msg msg; | |
933 | ||
934 | if (i == MAX_MEDIA) | |
935 | return 0; | |
936 | ||
937 | msg.skb = skb; | |
938 | msg.portid = NETLINK_CB(cb->skb).portid; | |
939 | msg.seq = cb->nlh->nlmsg_seq; | |
940 | ||
941 | rtnl_lock(); | |
942 | for (; media_info_array[i] != NULL; i++) { | |
f2f67390 ND |
943 | err = __tipc_nl_add_media(&msg, media_info_array[i], |
944 | NLM_F_MULTI); | |
46f15c67 RA |
945 | if (err) |
946 | break; | |
947 | } | |
948 | rtnl_unlock(); | |
949 | ||
950 | cb->args[0] = i; | |
951 | return skb->len; | |
952 | } | |
953 | ||
954 | int tipc_nl_media_get(struct sk_buff *skb, struct genl_info *info) | |
955 | { | |
956 | int err; | |
957 | char *name; | |
958 | struct tipc_nl_msg msg; | |
959 | struct tipc_media *media; | |
960 | struct sk_buff *rep; | |
961 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
962 | ||
963 | if (!info->attrs[TIPC_NLA_MEDIA]) | |
964 | return -EINVAL; | |
965 | ||
966 | err = nla_parse_nested(attrs, TIPC_NLA_MEDIA_MAX, | |
967 | info->attrs[TIPC_NLA_MEDIA], | |
968 | tipc_nl_media_policy); | |
969 | if (err) | |
970 | return err; | |
971 | ||
972 | if (!attrs[TIPC_NLA_MEDIA_NAME]) | |
973 | return -EINVAL; | |
974 | name = nla_data(attrs[TIPC_NLA_MEDIA_NAME]); | |
975 | ||
976 | rep = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); | |
977 | if (!rep) | |
978 | return -ENOMEM; | |
979 | ||
980 | msg.skb = rep; | |
981 | msg.portid = info->snd_portid; | |
982 | msg.seq = info->snd_seq; | |
983 | ||
984 | rtnl_lock(); | |
985 | media = tipc_media_find(name); | |
986 | if (!media) { | |
987 | err = -EINVAL; | |
988 | goto err_out; | |
989 | } | |
990 | ||
f2f67390 | 991 | err = __tipc_nl_add_media(&msg, media, 0); |
46f15c67 RA |
992 | if (err) |
993 | goto err_out; | |
994 | rtnl_unlock(); | |
995 | ||
996 | return genlmsg_reply(rep, info); | |
997 | err_out: | |
998 | rtnl_unlock(); | |
999 | nlmsg_free(rep); | |
1000 | ||
1001 | return err; | |
1002 | } | |
1e55417d RA |
1003 | |
1004 | int tipc_nl_media_set(struct sk_buff *skb, struct genl_info *info) | |
1005 | { | |
1006 | int err; | |
1007 | char *name; | |
1008 | struct tipc_media *m; | |
1009 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
1010 | ||
1011 | if (!info->attrs[TIPC_NLA_MEDIA]) | |
1012 | return -EINVAL; | |
1013 | ||
1014 | err = nla_parse_nested(attrs, TIPC_NLA_MEDIA_MAX, | |
1015 | info->attrs[TIPC_NLA_MEDIA], | |
1016 | tipc_nl_media_policy); | |
1017 | ||
1018 | if (!attrs[TIPC_NLA_MEDIA_NAME]) | |
1019 | return -EINVAL; | |
1020 | name = nla_data(attrs[TIPC_NLA_MEDIA_NAME]); | |
1021 | ||
1022 | rtnl_lock(); | |
1023 | m = tipc_media_find(name); | |
1024 | if (!m) { | |
1025 | rtnl_unlock(); | |
1026 | return -EINVAL; | |
1027 | } | |
1028 | ||
1029 | if (attrs[TIPC_NLA_MEDIA_PROP]) { | |
1030 | struct nlattr *props[TIPC_NLA_PROP_MAX + 1]; | |
1031 | ||
1032 | err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_MEDIA_PROP], | |
1033 | props); | |
1034 | if (err) { | |
1035 | rtnl_unlock(); | |
1036 | return err; | |
1037 | } | |
1038 | ||
1039 | if (props[TIPC_NLA_PROP_TOL]) | |
1040 | m->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]); | |
1041 | if (props[TIPC_NLA_PROP_PRIO]) | |
1042 | m->priority = nla_get_u32(props[TIPC_NLA_PROP_PRIO]); | |
1043 | if (props[TIPC_NLA_PROP_WIN]) | |
1044 | m->window = nla_get_u32(props[TIPC_NLA_PROP_WIN]); | |
1045 | } | |
1046 | rtnl_unlock(); | |
1047 | ||
1048 | return 0; | |
1049 | } |