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" |
49cc66ea | 43 | #include "netlink.h" |
b97bf3fd | 44 | |
a29a194a | 45 | #define MAX_ADDR_STR 60 |
b97bf3fd | 46 | |
ef72a7e0 | 47 | static struct tipc_media * const media_info_array[] = { |
5702dbab JPM |
48 | ð_media_info, |
49 | #ifdef CONFIG_TIPC_MEDIA_IB | |
50 | &ib_media_info, | |
d0f91938 EH |
51 | #endif |
52 | #ifdef CONFIG_TIPC_MEDIA_UDP | |
53 | &udp_media_info, | |
5702dbab JPM |
54 | #endif |
55 | NULL | |
56 | }; | |
b97bf3fd | 57 | |
1a90632d | 58 | static void bearer_disable(struct net *net, struct tipc_bearer *b); |
3a777ff8 | 59 | |
b97bf3fd | 60 | /** |
5c216e1d | 61 | * tipc_media_find - locates specified media object by name |
b97bf3fd | 62 | */ |
358a0d1c | 63 | struct tipc_media *tipc_media_find(const char *name) |
b97bf3fd | 64 | { |
b97bf3fd PL |
65 | u32 i; |
66 | ||
ef72a7e0 JPM |
67 | for (i = 0; media_info_array[i] != NULL; i++) { |
68 | if (!strcmp(media_info_array[i]->name, name)) | |
5702dbab | 69 | break; |
b97bf3fd | 70 | } |
ef72a7e0 | 71 | return media_info_array[i]; |
b97bf3fd PL |
72 | } |
73 | ||
c79be454 AS |
74 | /** |
75 | * media_find_id - locates specified media object by type identifier | |
76 | */ | |
358a0d1c | 77 | static struct tipc_media *media_find_id(u8 type) |
c79be454 AS |
78 | { |
79 | u32 i; | |
80 | ||
ef72a7e0 JPM |
81 | for (i = 0; media_info_array[i] != NULL; i++) { |
82 | if (media_info_array[i]->type_id == type) | |
5702dbab | 83 | break; |
c79be454 | 84 | } |
ef72a7e0 | 85 | return media_info_array[i]; |
b97bf3fd PL |
86 | } |
87 | ||
88 | /** | |
4323add6 | 89 | * tipc_media_addr_printf - record media address in print buffer |
b97bf3fd | 90 | */ |
dc1aed37 | 91 | void tipc_media_addr_printf(char *buf, int len, struct tipc_media_addr *a) |
b97bf3fd | 92 | { |
c61b666e | 93 | char addr_str[MAX_ADDR_STR]; |
1a90632d | 94 | struct tipc_media *m; |
dc1aed37 | 95 | int ret; |
b97bf3fd | 96 | |
1a90632d | 97 | m = media_find_id(a->media_id); |
b97bf3fd | 98 | |
1a90632d JPM |
99 | if (m && !m->addr2str(a, addr_str, sizeof(addr_str))) |
100 | ret = scnprintf(buf, len, "%s(%s)", m->name, addr_str); | |
c61b666e | 101 | else { |
c61b666e | 102 | u32 i; |
b97bf3fd | 103 | |
941787b8 | 104 | ret = scnprintf(buf, len, "UNKNOWN(%u)", a->media_id); |
3d749a6a | 105 | for (i = 0; i < sizeof(a->value); i++) |
941787b8 | 106 | ret += scnprintf(buf - ret, len + ret, |
dc1aed37 | 107 | "-%02x", a->value[i]); |
b97bf3fd PL |
108 | } |
109 | } | |
110 | ||
b97bf3fd PL |
111 | /** |
112 | * bearer_name_validate - validate & (optionally) deconstruct bearer name | |
2c53040f BH |
113 | * @name: ptr to bearer name string |
114 | * @name_parts: ptr to area for bearer name components (or NULL if not needed) | |
c4307285 | 115 | * |
b97bf3fd PL |
116 | * Returns 1 if bearer name is valid, otherwise 0. |
117 | */ | |
c4307285 | 118 | static int bearer_name_validate(const char *name, |
f19765f4 | 119 | struct tipc_bearer_names *name_parts) |
b97bf3fd PL |
120 | { |
121 | char name_copy[TIPC_MAX_BEARER_NAME]; | |
122 | char *media_name; | |
123 | char *if_name; | |
124 | u32 media_len; | |
125 | u32 if_len; | |
126 | ||
127 | /* copy bearer name & ensure length is OK */ | |
b97bf3fd PL |
128 | name_copy[TIPC_MAX_BEARER_NAME - 1] = 0; |
129 | /* need above in case non-Posix strncpy() doesn't pad with nulls */ | |
130 | strncpy(name_copy, name, TIPC_MAX_BEARER_NAME); | |
131 | if (name_copy[TIPC_MAX_BEARER_NAME - 1] != 0) | |
132 | return 0; | |
133 | ||
134 | /* ensure all component parts of bearer name are present */ | |
b97bf3fd | 135 | media_name = name_copy; |
2db9983a AS |
136 | if_name = strchr(media_name, ':'); |
137 | if (if_name == NULL) | |
b97bf3fd PL |
138 | return 0; |
139 | *(if_name++) = 0; | |
140 | media_len = if_name - media_name; | |
141 | if_len = strlen(if_name) + 1; | |
142 | ||
143 | /* validate component parts of bearer name */ | |
c4307285 | 144 | if ((media_len <= 1) || (media_len > TIPC_MAX_MEDIA_NAME) || |
fc073938 | 145 | (if_len <= 1) || (if_len > TIPC_MAX_IF_NAME)) |
b97bf3fd PL |
146 | return 0; |
147 | ||
148 | /* return bearer name components, if necessary */ | |
b97bf3fd PL |
149 | if (name_parts) { |
150 | strcpy(name_parts->media_name, media_name); | |
151 | strcpy(name_parts->if_name, if_name); | |
152 | } | |
153 | return 1; | |
154 | } | |
155 | ||
156 | /** | |
5c216e1d | 157 | * tipc_bearer_find - locates bearer object with matching bearer name |
b97bf3fd | 158 | */ |
7f9f95d9 | 159 | struct tipc_bearer *tipc_bearer_find(struct net *net, const char *name) |
b97bf3fd | 160 | { |
7f9f95d9 | 161 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
1a90632d | 162 | struct tipc_bearer *b; |
b97bf3fd PL |
163 | u32 i; |
164 | ||
3874ccbb | 165 | for (i = 0; i < MAX_BEARERS; i++) { |
1a90632d JPM |
166 | b = rtnl_dereference(tn->bearer_list[i]); |
167 | if (b && (!strcmp(b->name, name))) | |
168 | return b; | |
b97bf3fd | 169 | } |
1fc54d8f | 170 | return NULL; |
b97bf3fd PL |
171 | } |
172 | ||
7f9f95d9 | 173 | void tipc_bearer_add_dest(struct net *net, u32 bearer_id, u32 dest) |
b97bf3fd | 174 | { |
7f9f95d9 | 175 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
1a90632d | 176 | struct tipc_bearer *b; |
7a2f7d18 YX |
177 | |
178 | rcu_read_lock(); | |
1a90632d JPM |
179 | b = rcu_dereference_rtnl(tn->bearer_list[bearer_id]); |
180 | if (b) | |
181 | tipc_disc_add_dest(b->link_req); | |
7a2f7d18 | 182 | rcu_read_unlock(); |
b97bf3fd PL |
183 | } |
184 | ||
7f9f95d9 | 185 | void tipc_bearer_remove_dest(struct net *net, u32 bearer_id, u32 dest) |
b97bf3fd | 186 | { |
7f9f95d9 | 187 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
1a90632d | 188 | struct tipc_bearer *b; |
7a2f7d18 YX |
189 | |
190 | rcu_read_lock(); | |
1a90632d JPM |
191 | b = rcu_dereference_rtnl(tn->bearer_list[bearer_id]); |
192 | if (b) | |
193 | tipc_disc_remove_dest(b->link_req); | |
7a2f7d18 | 194 | rcu_read_unlock(); |
b97bf3fd PL |
195 | } |
196 | ||
b97bf3fd PL |
197 | /** |
198 | * tipc_enable_bearer - enable bearer with the given name | |
c4307285 | 199 | */ |
9ab15465 | 200 | static int tipc_enable_bearer(struct net *net, const char *name, |
d0f91938 EH |
201 | u32 disc_domain, u32 priority, |
202 | struct nlattr *attr[]) | |
b97bf3fd | 203 | { |
7f9f95d9 | 204 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
1a90632d JPM |
205 | struct tipc_bearer *b; |
206 | struct tipc_media *m; | |
f19765f4 | 207 | struct tipc_bearer_names b_names; |
b97bf3fd PL |
208 | char addr_string[16]; |
209 | u32 bearer_id; | |
210 | u32 with_this_prio; | |
211 | u32 i; | |
212 | int res = -EINVAL; | |
213 | ||
34747539 | 214 | if (!tn->own_addr) { |
2cf8aa19 EH |
215 | pr_warn("Bearer <%s> rejected, not supported in standalone mode\n", |
216 | name); | |
b97bf3fd | 217 | return -ENOPROTOOPT; |
a10bd924 | 218 | } |
f19765f4 | 219 | if (!bearer_name_validate(name, &b_names)) { |
2cf8aa19 | 220 | pr_warn("Bearer <%s> rejected, illegal name\n", name); |
16cb4b33 | 221 | return -EINVAL; |
a10bd924 | 222 | } |
66e019a6 | 223 | if (tipc_addr_domain_valid(disc_domain) && |
34747539 YX |
224 | (disc_domain != tn->own_addr)) { |
225 | if (tipc_in_scope(disc_domain, tn->own_addr)) { | |
226 | disc_domain = tn->own_addr & TIPC_CLUSTER_MASK; | |
66e019a6 | 227 | res = 0; /* accept any node in own cluster */ |
34747539 | 228 | } else if (in_own_cluster_exact(net, disc_domain)) |
66e019a6 AS |
229 | res = 0; /* accept specified node in own cluster */ |
230 | } | |
231 | if (res) { | |
2cf8aa19 EH |
232 | pr_warn("Bearer <%s> rejected, illegal discovery domain\n", |
233 | name); | |
a10bd924 AS |
234 | return -EINVAL; |
235 | } | |
9efde4a0 | 236 | if ((priority > TIPC_MAX_LINK_PRI) && |
a10bd924 | 237 | (priority != TIPC_MEDIA_LINK_PRI)) { |
2cf8aa19 | 238 | pr_warn("Bearer <%s> rejected, illegal priority\n", name); |
b97bf3fd | 239 | return -EINVAL; |
a10bd924 | 240 | } |
b97bf3fd | 241 | |
1a90632d JPM |
242 | m = tipc_media_find(b_names.media_name); |
243 | if (!m) { | |
2cf8aa19 EH |
244 | pr_warn("Bearer <%s> rejected, media <%s> not registered\n", |
245 | name, b_names.media_name); | |
7216cd94 | 246 | return -EINVAL; |
b97bf3fd | 247 | } |
16cb4b33 PL |
248 | |
249 | if (priority == TIPC_MEDIA_LINK_PRI) | |
1a90632d | 250 | priority = m->priority; |
b97bf3fd PL |
251 | |
252 | restart: | |
253 | bearer_id = MAX_BEARERS; | |
254 | with_this_prio = 1; | |
255 | for (i = MAX_BEARERS; i-- != 0; ) { | |
1a90632d JPM |
256 | b = rtnl_dereference(tn->bearer_list[i]); |
257 | if (!b) { | |
b97bf3fd PL |
258 | bearer_id = i; |
259 | continue; | |
260 | } | |
1a90632d | 261 | if (!strcmp(name, b->name)) { |
2cf8aa19 EH |
262 | pr_warn("Bearer <%s> rejected, already enabled\n", |
263 | name); | |
7216cd94 | 264 | return -EINVAL; |
b97bf3fd | 265 | } |
1a90632d | 266 | if ((b->priority == priority) && |
b97bf3fd PL |
267 | (++with_this_prio > 2)) { |
268 | if (priority-- == 0) { | |
2cf8aa19 EH |
269 | pr_warn("Bearer <%s> rejected, duplicate priority\n", |
270 | name); | |
7216cd94 | 271 | return -EINVAL; |
b97bf3fd | 272 | } |
2cf8aa19 EH |
273 | pr_warn("Bearer <%s> priority adjustment required %u->%u\n", |
274 | name, priority + 1, priority); | |
b97bf3fd PL |
275 | goto restart; |
276 | } | |
277 | } | |
278 | if (bearer_id >= MAX_BEARERS) { | |
2cf8aa19 EH |
279 | pr_warn("Bearer <%s> rejected, bearer limit reached (%u)\n", |
280 | name, MAX_BEARERS); | |
7216cd94 | 281 | return -EINVAL; |
b97bf3fd PL |
282 | } |
283 | ||
1a90632d JPM |
284 | b = kzalloc(sizeof(*b), GFP_ATOMIC); |
285 | if (!b) | |
7216cd94 YX |
286 | return -ENOMEM; |
287 | ||
1a90632d JPM |
288 | strcpy(b->name, name); |
289 | b->media = m; | |
290 | res = m->enable_media(net, b, attr); | |
b97bf3fd | 291 | if (res) { |
2cf8aa19 EH |
292 | pr_warn("Bearer <%s> rejected, enable failure (%d)\n", |
293 | name, -res); | |
7216cd94 | 294 | return -EINVAL; |
b97bf3fd PL |
295 | } |
296 | ||
1a90632d JPM |
297 | b->identity = bearer_id; |
298 | b->tolerance = m->tolerance; | |
299 | b->window = m->window; | |
300 | b->domain = disc_domain; | |
301 | b->net_plane = bearer_id + 'A'; | |
302 | b->priority = priority; | |
3a777ff8 | 303 | |
1a90632d | 304 | res = tipc_disc_create(net, b, &b->bcast_addr); |
3a777ff8 | 305 | if (res) { |
1a90632d | 306 | bearer_disable(net, b); |
2cf8aa19 EH |
307 | pr_warn("Bearer <%s> rejected, discovery object creation failed\n", |
308 | name); | |
7216cd94 | 309 | return -EINVAL; |
3a777ff8 | 310 | } |
3874ccbb | 311 | |
1a90632d | 312 | rcu_assign_pointer(tn->bearer_list[bearer_id], b); |
3874ccbb | 313 | |
2cf8aa19 EH |
314 | pr_info("Enabled bearer <%s>, discovery domain %s, priority %u\n", |
315 | name, | |
316 | tipc_addr_string_fill(addr_string, disc_domain), priority); | |
b97bf3fd PL |
317 | return res; |
318 | } | |
319 | ||
320 | /** | |
512137ee | 321 | * tipc_reset_bearer - Reset all links established over this bearer |
b97bf3fd | 322 | */ |
1a90632d | 323 | static int tipc_reset_bearer(struct net *net, struct tipc_bearer *b) |
b97bf3fd | 324 | { |
1a90632d JPM |
325 | pr_info("Resetting bearer <%s>\n", b->name); |
326 | tipc_node_delete_links(net, b->identity); | |
327 | tipc_disc_reset(net, b); | |
0e35fd5e | 328 | return 0; |
b97bf3fd PL |
329 | } |
330 | ||
331 | /** | |
617d3c7a | 332 | * bearer_disable |
c4307285 | 333 | * |
7216cd94 | 334 | * Note: This routine assumes caller holds RTNL lock. |
b97bf3fd | 335 | */ |
1a90632d | 336 | static void bearer_disable(struct net *net, struct tipc_bearer *b) |
b97bf3fd | 337 | { |
7f9f95d9 | 338 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
3874ccbb YX |
339 | u32 i; |
340 | ||
1a90632d JPM |
341 | pr_info("Disabling bearer <%s>\n", b->name); |
342 | b->media->disable_media(b); | |
d4cca39d | 343 | |
1a90632d JPM |
344 | tipc_node_delete_links(net, b->identity); |
345 | RCU_INIT_POINTER(b->media_ptr, NULL); | |
346 | if (b->link_req) | |
347 | tipc_disc_delete(b->link_req); | |
3874ccbb YX |
348 | |
349 | for (i = 0; i < MAX_BEARERS; i++) { | |
1a90632d | 350 | if (b == rtnl_dereference(tn->bearer_list[i])) { |
7f9f95d9 | 351 | RCU_INIT_POINTER(tn->bearer_list[i], NULL); |
3874ccbb YX |
352 | break; |
353 | } | |
354 | } | |
1a90632d | 355 | kfree_rcu(b, rcu); |
b97bf3fd PL |
356 | } |
357 | ||
d0f91938 EH |
358 | int tipc_enable_l2_media(struct net *net, struct tipc_bearer *b, |
359 | struct nlattr *attr[]) | |
e4d050cb YX |
360 | { |
361 | struct net_device *dev; | |
362 | char *driver_name = strchr((const char *)b->name, ':') + 1; | |
363 | ||
364 | /* Find device with specified name */ | |
7f9f95d9 | 365 | dev = dev_get_by_name(net, driver_name); |
e4d050cb YX |
366 | if (!dev) |
367 | return -ENODEV; | |
368 | ||
38504c28 | 369 | /* Associate TIPC bearer with L2 bearer */ |
2231c5af | 370 | rcu_assign_pointer(b->media_ptr, dev); |
38504c28 | 371 | memset(&b->bcast_addr, 0, sizeof(b->bcast_addr)); |
e4d050cb YX |
372 | memcpy(b->bcast_addr.value, dev->broadcast, b->media->hwaddr_len); |
373 | b->bcast_addr.media_id = b->media->type_id; | |
374 | b->bcast_addr.broadcast = 1; | |
375 | b->mtu = dev->mtu; | |
38504c28 | 376 | b->media->raw2addr(b, &b->addr, (char *)dev->dev_addr); |
e4d050cb YX |
377 | rcu_assign_pointer(dev->tipc_ptr, b); |
378 | return 0; | |
379 | } | |
380 | ||
38504c28 | 381 | /* tipc_disable_l2_media - detach TIPC bearer from an L2 interface |
e4d050cb | 382 | * |
282b3a05 | 383 | * Mark L2 bearer as inactive so that incoming buffers are thrown away |
e4d050cb YX |
384 | */ |
385 | void tipc_disable_l2_media(struct tipc_bearer *b) | |
386 | { | |
2231c5af YX |
387 | struct net_device *dev; |
388 | ||
389 | dev = (struct net_device *)rtnl_dereference(b->media_ptr); | |
e4d050cb | 390 | RCU_INIT_POINTER(dev->tipc_ptr, NULL); |
f1c8d8cb | 391 | synchronize_net(); |
e4d050cb YX |
392 | dev_put(dev); |
393 | } | |
394 | ||
395 | /** | |
38504c28 | 396 | * tipc_l2_send_msg - send a TIPC packet out over an L2 interface |
e4d050cb | 397 | * @buf: the packet to be sent |
1a90632d | 398 | * @b: the bearer through which the packet is to be sent |
e4d050cb YX |
399 | * @dest: peer destination address |
400 | */ | |
7214bcf8 | 401 | int tipc_l2_send_msg(struct net *net, struct sk_buff *skb, |
1da46568 | 402 | struct tipc_bearer *b, struct tipc_media_addr *dest) |
e4d050cb | 403 | { |
2231c5af | 404 | struct net_device *dev; |
e4d050cb | 405 | int delta; |
2231c5af YX |
406 | |
407 | dev = (struct net_device *)rcu_dereference_rtnl(b->media_ptr); | |
408 | if (!dev) | |
409 | return 0; | |
e4d050cb | 410 | |
7214bcf8 | 411 | delta = dev->hard_header_len - skb_headroom(skb); |
e4d050cb | 412 | if ((delta > 0) && |
7214bcf8 JPM |
413 | pskb_expand_head(skb, SKB_DATA_ALIGN(delta), 0, GFP_ATOMIC)) { |
414 | kfree_skb(skb); | |
e4d050cb YX |
415 | return 0; |
416 | } | |
417 | ||
7214bcf8 JPM |
418 | skb_reset_network_header(skb); |
419 | skb->dev = dev; | |
420 | skb->protocol = htons(ETH_P_TIPC); | |
421 | dev_hard_header(skb, dev, ETH_P_TIPC, dest->value, | |
422 | dev->dev_addr, skb->len); | |
423 | dev_queue_xmit(skb); | |
e4d050cb YX |
424 | return 0; |
425 | } | |
426 | ||
959e1781 JPM |
427 | int tipc_bearer_mtu(struct net *net, u32 bearer_id) |
428 | { | |
429 | int mtu = 0; | |
430 | struct tipc_bearer *b; | |
431 | ||
432 | rcu_read_lock(); | |
433 | b = rcu_dereference_rtnl(tipc_net(net)->bearer_list[bearer_id]); | |
434 | if (b) | |
435 | mtu = b->mtu; | |
436 | rcu_read_unlock(); | |
437 | return mtu; | |
438 | } | |
439 | ||
60852d67 JPM |
440 | /* tipc_bearer_xmit_skb - sends buffer to destination over bearer |
441 | */ | |
442 | void tipc_bearer_xmit_skb(struct net *net, u32 bearer_id, | |
443 | struct sk_buff *skb, | |
444 | struct tipc_media_addr *dest) | |
445 | { | |
446 | struct tipc_net *tn = tipc_net(net); | |
447 | struct tipc_bearer *b; | |
448 | ||
449 | rcu_read_lock(); | |
450 | b = rcu_dereference_rtnl(tn->bearer_list[bearer_id]); | |
451 | if (likely(b)) | |
452 | b->media->send_msg(net, skb, b, dest); | |
453 | rcu_read_unlock(); | |
60852d67 JPM |
454 | } |
455 | ||
af9b028e JPM |
456 | /* tipc_bearer_xmit() -send buffer to destination over bearer |
457 | */ | |
458 | void tipc_bearer_xmit(struct net *net, u32 bearer_id, | |
459 | struct sk_buff_head *xmitq, | |
460 | struct tipc_media_addr *dst) | |
461 | { | |
462 | struct tipc_net *tn = net_generic(net, tipc_net_id); | |
463 | struct tipc_bearer *b; | |
464 | struct sk_buff *skb, *tmp; | |
465 | ||
466 | if (skb_queue_empty(xmitq)) | |
467 | return; | |
468 | ||
469 | rcu_read_lock(); | |
470 | b = rcu_dereference_rtnl(tn->bearer_list[bearer_id]); | |
471 | if (likely(b)) { | |
472 | skb_queue_walk_safe(xmitq, skb, tmp) { | |
473 | __skb_dequeue(xmitq); | |
474 | b->media->send_msg(net, skb, b, dst); | |
b06b281e JPM |
475 | } |
476 | } | |
477 | rcu_read_unlock(); | |
478 | } | |
479 | ||
480 | /* tipc_bearer_bc_xmit() - broadcast buffers to all destinations | |
481 | */ | |
482 | void tipc_bearer_bc_xmit(struct net *net, u32 bearer_id, | |
483 | struct sk_buff_head *xmitq) | |
484 | { | |
485 | struct tipc_net *tn = tipc_net(net); | |
486 | int net_id = tn->net_id; | |
487 | struct tipc_bearer *b; | |
488 | struct sk_buff *skb, *tmp; | |
489 | struct tipc_msg *hdr; | |
490 | ||
491 | rcu_read_lock(); | |
492 | b = rcu_dereference_rtnl(tn->bearer_list[bearer_id]); | |
493 | if (likely(b)) { | |
494 | skb_queue_walk_safe(xmitq, skb, tmp) { | |
495 | hdr = buf_msg(skb); | |
496 | msg_set_non_seq(hdr, 1); | |
497 | msg_set_mc_netid(hdr, net_id); | |
498 | __skb_dequeue(xmitq); | |
499 | b->media->send_msg(net, skb, b, &b->bcast_addr); | |
af9b028e JPM |
500 | } |
501 | } | |
502 | rcu_read_unlock(); | |
503 | } | |
504 | ||
6e967adf YX |
505 | /** |
506 | * tipc_l2_rcv_msg - handle incoming TIPC message from an interface | |
507 | * @buf: the received packet | |
508 | * @dev: the net device that the packet was received on | |
509 | * @pt: the packet_type structure which was used to register this handler | |
510 | * @orig_dev: the original receive net device in case the device is a bond | |
511 | * | |
512 | * Accept only packets explicitly sent to this node, or broadcast packets; | |
513 | * ignores packets sent using interface multicast, and traffic sent to other | |
514 | * nodes (which can happen if interface is running in promiscuous mode). | |
515 | */ | |
516 | static int tipc_l2_rcv_msg(struct sk_buff *buf, struct net_device *dev, | |
517 | struct packet_type *pt, struct net_device *orig_dev) | |
518 | { | |
1a90632d | 519 | struct tipc_bearer *b; |
6e967adf | 520 | |
6e967adf | 521 | rcu_read_lock(); |
1a90632d JPM |
522 | b = rcu_dereference_rtnl(dev->tipc_ptr); |
523 | if (likely(b)) { | |
6e967adf YX |
524 | if (likely(buf->pkt_type <= PACKET_BROADCAST)) { |
525 | buf->next = NULL; | |
1a90632d | 526 | tipc_rcv(dev_net(dev), buf, b); |
6e967adf YX |
527 | rcu_read_unlock(); |
528 | return NET_RX_SUCCESS; | |
529 | } | |
530 | } | |
531 | rcu_read_unlock(); | |
532 | ||
533 | kfree_skb(buf); | |
534 | return NET_RX_DROP; | |
535 | } | |
536 | ||
537 | /** | |
538 | * tipc_l2_device_event - handle device events from network device | |
539 | * @nb: the context of the notification | |
540 | * @evt: the type of event | |
541 | * @ptr: the net device that the event was on | |
542 | * | |
543 | * This function is called by the Ethernet driver in case of link | |
544 | * change event. | |
545 | */ | |
546 | static int tipc_l2_device_event(struct notifier_block *nb, unsigned long evt, | |
547 | void *ptr) | |
548 | { | |
6e967adf | 549 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
c93d3baa | 550 | struct net *net = dev_net(dev); |
1a90632d | 551 | struct tipc_bearer *b; |
6e967adf | 552 | |
1a90632d JPM |
553 | b = rtnl_dereference(dev->tipc_ptr); |
554 | if (!b) | |
6e967adf | 555 | return NOTIFY_DONE; |
6e967adf | 556 | |
1a90632d | 557 | b->mtu = dev->mtu; |
6e967adf YX |
558 | |
559 | switch (evt) { | |
560 | case NETDEV_CHANGE: | |
561 | if (netif_carrier_ok(dev)) | |
562 | break; | |
282b3a05 | 563 | case NETDEV_GOING_DOWN: |
6e967adf | 564 | case NETDEV_CHANGEMTU: |
1a90632d | 565 | tipc_reset_bearer(net, b); |
a21a584d | 566 | break; |
6e967adf | 567 | case NETDEV_CHANGEADDR: |
1a90632d | 568 | b->media->raw2addr(b, &b->addr, |
a21a584d | 569 | (char *)dev->dev_addr); |
1a90632d | 570 | tipc_reset_bearer(net, b); |
6e967adf YX |
571 | break; |
572 | case NETDEV_UNREGISTER: | |
573 | case NETDEV_CHANGENAME: | |
1a90632d | 574 | bearer_disable(dev_net(dev), b); |
6e967adf YX |
575 | break; |
576 | } | |
6e967adf YX |
577 | return NOTIFY_OK; |
578 | } | |
579 | ||
580 | static struct packet_type tipc_packet_type __read_mostly = { | |
184593c7 | 581 | .type = htons(ETH_P_TIPC), |
6e967adf YX |
582 | .func = tipc_l2_rcv_msg, |
583 | }; | |
584 | ||
585 | static struct notifier_block notifier = { | |
586 | .notifier_call = tipc_l2_device_event, | |
587 | .priority = 0, | |
588 | }; | |
589 | ||
590 | int tipc_bearer_setup(void) | |
591 | { | |
970122fd YX |
592 | int err; |
593 | ||
594 | err = register_netdevice_notifier(¬ifier); | |
595 | if (err) | |
596 | return err; | |
6e967adf | 597 | dev_add_pack(&tipc_packet_type); |
970122fd | 598 | return 0; |
6e967adf YX |
599 | } |
600 | ||
601 | void tipc_bearer_cleanup(void) | |
602 | { | |
603 | unregister_netdevice_notifier(¬ifier); | |
604 | dev_remove_pack(&tipc_packet_type); | |
605 | } | |
b97bf3fd | 606 | |
f2f9800d | 607 | void tipc_bearer_stop(struct net *net) |
b97bf3fd | 608 | { |
7f9f95d9 | 609 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
1a90632d | 610 | struct tipc_bearer *b; |
b97bf3fd PL |
611 | u32 i; |
612 | ||
b97bf3fd | 613 | for (i = 0; i < MAX_BEARERS; i++) { |
1a90632d JPM |
614 | b = rtnl_dereference(tn->bearer_list[i]); |
615 | if (b) { | |
616 | bearer_disable(net, b); | |
7f9f95d9 | 617 | tn->bearer_list[i] = NULL; |
3874ccbb | 618 | } |
b97bf3fd | 619 | } |
b97bf3fd | 620 | } |
0655f6a8 | 621 | |
35b9dd76 | 622 | /* Caller should hold rtnl_lock to protect the bearer */ |
d8182804 | 623 | static int __tipc_nl_add_bearer(struct tipc_nl_msg *msg, |
f2f67390 | 624 | struct tipc_bearer *bearer, int nlflags) |
35b9dd76 RA |
625 | { |
626 | void *hdr; | |
627 | struct nlattr *attrs; | |
628 | struct nlattr *prop; | |
629 | ||
bfb3e5dd | 630 | hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family, |
f2f67390 | 631 | nlflags, TIPC_NL_BEARER_GET); |
35b9dd76 RA |
632 | if (!hdr) |
633 | return -EMSGSIZE; | |
634 | ||
635 | attrs = nla_nest_start(msg->skb, TIPC_NLA_BEARER); | |
636 | if (!attrs) | |
637 | goto msg_full; | |
638 | ||
639 | if (nla_put_string(msg->skb, TIPC_NLA_BEARER_NAME, bearer->name)) | |
640 | goto attr_msg_full; | |
641 | ||
642 | prop = nla_nest_start(msg->skb, TIPC_NLA_BEARER_PROP); | |
643 | if (!prop) | |
644 | goto prop_msg_full; | |
645 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, bearer->priority)) | |
646 | goto prop_msg_full; | |
647 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, bearer->tolerance)) | |
648 | goto prop_msg_full; | |
649 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, bearer->window)) | |
650 | goto prop_msg_full; | |
651 | ||
652 | nla_nest_end(msg->skb, prop); | |
653 | nla_nest_end(msg->skb, attrs); | |
654 | genlmsg_end(msg->skb, hdr); | |
655 | ||
656 | return 0; | |
657 | ||
658 | prop_msg_full: | |
659 | nla_nest_cancel(msg->skb, prop); | |
660 | attr_msg_full: | |
661 | nla_nest_cancel(msg->skb, attrs); | |
662 | msg_full: | |
663 | genlmsg_cancel(msg->skb, hdr); | |
664 | ||
665 | return -EMSGSIZE; | |
666 | } | |
667 | ||
668 | int tipc_nl_bearer_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
669 | { | |
670 | int err; | |
671 | int i = cb->args[0]; | |
672 | struct tipc_bearer *bearer; | |
673 | struct tipc_nl_msg msg; | |
7f9f95d9 YX |
674 | struct net *net = sock_net(skb->sk); |
675 | struct tipc_net *tn = net_generic(net, tipc_net_id); | |
35b9dd76 RA |
676 | |
677 | if (i == MAX_BEARERS) | |
678 | return 0; | |
679 | ||
680 | msg.skb = skb; | |
681 | msg.portid = NETLINK_CB(cb->skb).portid; | |
682 | msg.seq = cb->nlh->nlmsg_seq; | |
683 | ||
684 | rtnl_lock(); | |
685 | for (i = 0; i < MAX_BEARERS; i++) { | |
7f9f95d9 | 686 | bearer = rtnl_dereference(tn->bearer_list[i]); |
35b9dd76 RA |
687 | if (!bearer) |
688 | continue; | |
689 | ||
f2f67390 | 690 | err = __tipc_nl_add_bearer(&msg, bearer, NLM_F_MULTI); |
35b9dd76 RA |
691 | if (err) |
692 | break; | |
693 | } | |
694 | rtnl_unlock(); | |
695 | ||
696 | cb->args[0] = i; | |
697 | return skb->len; | |
698 | } | |
699 | ||
700 | int tipc_nl_bearer_get(struct sk_buff *skb, struct genl_info *info) | |
701 | { | |
702 | int err; | |
703 | char *name; | |
704 | struct sk_buff *rep; | |
705 | struct tipc_bearer *bearer; | |
706 | struct tipc_nl_msg msg; | |
707 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
7f9f95d9 | 708 | struct net *net = genl_info_net(info); |
35b9dd76 RA |
709 | |
710 | if (!info->attrs[TIPC_NLA_BEARER]) | |
711 | return -EINVAL; | |
712 | ||
713 | err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX, | |
714 | info->attrs[TIPC_NLA_BEARER], | |
715 | tipc_nl_bearer_policy); | |
716 | if (err) | |
717 | return err; | |
718 | ||
719 | if (!attrs[TIPC_NLA_BEARER_NAME]) | |
720 | return -EINVAL; | |
721 | name = nla_data(attrs[TIPC_NLA_BEARER_NAME]); | |
722 | ||
723 | rep = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); | |
724 | if (!rep) | |
725 | return -ENOMEM; | |
726 | ||
727 | msg.skb = rep; | |
728 | msg.portid = info->snd_portid; | |
729 | msg.seq = info->snd_seq; | |
730 | ||
731 | rtnl_lock(); | |
7f9f95d9 | 732 | bearer = tipc_bearer_find(net, name); |
35b9dd76 RA |
733 | if (!bearer) { |
734 | err = -EINVAL; | |
735 | goto err_out; | |
736 | } | |
737 | ||
f2f67390 | 738 | err = __tipc_nl_add_bearer(&msg, bearer, 0); |
35b9dd76 RA |
739 | if (err) |
740 | goto err_out; | |
741 | rtnl_unlock(); | |
742 | ||
743 | return genlmsg_reply(rep, info); | |
744 | err_out: | |
745 | rtnl_unlock(); | |
746 | nlmsg_free(rep); | |
747 | ||
748 | return err; | |
749 | } | |
750 | ||
0655f6a8 RA |
751 | int tipc_nl_bearer_disable(struct sk_buff *skb, struct genl_info *info) |
752 | { | |
753 | int err; | |
754 | char *name; | |
755 | struct tipc_bearer *bearer; | |
756 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
9ab15465 | 757 | struct net *net = sock_net(skb->sk); |
0655f6a8 RA |
758 | |
759 | if (!info->attrs[TIPC_NLA_BEARER]) | |
760 | return -EINVAL; | |
761 | ||
762 | err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX, | |
763 | info->attrs[TIPC_NLA_BEARER], | |
764 | tipc_nl_bearer_policy); | |
765 | if (err) | |
766 | return err; | |
767 | ||
768 | if (!attrs[TIPC_NLA_BEARER_NAME]) | |
769 | return -EINVAL; | |
770 | ||
771 | name = nla_data(attrs[TIPC_NLA_BEARER_NAME]); | |
772 | ||
773 | rtnl_lock(); | |
7f9f95d9 | 774 | bearer = tipc_bearer_find(net, name); |
0655f6a8 RA |
775 | if (!bearer) { |
776 | rtnl_unlock(); | |
777 | return -EINVAL; | |
778 | } | |
779 | ||
b1c29f6b | 780 | bearer_disable(net, bearer); |
0655f6a8 RA |
781 | rtnl_unlock(); |
782 | ||
783 | return 0; | |
784 | } | |
785 | ||
786 | int tipc_nl_bearer_enable(struct sk_buff *skb, struct genl_info *info) | |
787 | { | |
788 | int err; | |
789 | char *bearer; | |
790 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
9ab15465 RA |
791 | struct net *net = sock_net(skb->sk); |
792 | struct tipc_net *tn = net_generic(net, tipc_net_id); | |
0655f6a8 RA |
793 | u32 domain; |
794 | u32 prio; | |
795 | ||
796 | prio = TIPC_MEDIA_LINK_PRI; | |
34747539 | 797 | domain = tn->own_addr & TIPC_CLUSTER_MASK; |
0655f6a8 RA |
798 | |
799 | if (!info->attrs[TIPC_NLA_BEARER]) | |
800 | return -EINVAL; | |
801 | ||
802 | err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX, | |
803 | info->attrs[TIPC_NLA_BEARER], | |
804 | tipc_nl_bearer_policy); | |
805 | if (err) | |
806 | return err; | |
807 | ||
808 | if (!attrs[TIPC_NLA_BEARER_NAME]) | |
809 | return -EINVAL; | |
810 | ||
811 | bearer = nla_data(attrs[TIPC_NLA_BEARER_NAME]); | |
812 | ||
813 | if (attrs[TIPC_NLA_BEARER_DOMAIN]) | |
814 | domain = nla_get_u32(attrs[TIPC_NLA_BEARER_DOMAIN]); | |
815 | ||
816 | if (attrs[TIPC_NLA_BEARER_PROP]) { | |
817 | struct nlattr *props[TIPC_NLA_PROP_MAX + 1]; | |
818 | ||
819 | err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_BEARER_PROP], | |
820 | props); | |
821 | if (err) | |
822 | return err; | |
823 | ||
824 | if (props[TIPC_NLA_PROP_PRIO]) | |
825 | prio = nla_get_u32(props[TIPC_NLA_PROP_PRIO]); | |
826 | } | |
827 | ||
828 | rtnl_lock(); | |
d0f91938 | 829 | err = tipc_enable_bearer(net, bearer, domain, prio, attrs); |
0655f6a8 RA |
830 | if (err) { |
831 | rtnl_unlock(); | |
832 | return err; | |
833 | } | |
834 | rtnl_unlock(); | |
835 | ||
836 | return 0; | |
837 | } | |
315c00bc RA |
838 | |
839 | int tipc_nl_bearer_set(struct sk_buff *skb, struct genl_info *info) | |
840 | { | |
841 | int err; | |
842 | char *name; | |
843 | struct tipc_bearer *b; | |
844 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
c3d6fb85 | 845 | struct net *net = sock_net(skb->sk); |
315c00bc RA |
846 | |
847 | if (!info->attrs[TIPC_NLA_BEARER]) | |
848 | return -EINVAL; | |
849 | ||
850 | err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX, | |
851 | info->attrs[TIPC_NLA_BEARER], | |
852 | tipc_nl_bearer_policy); | |
853 | if (err) | |
854 | return err; | |
855 | ||
856 | if (!attrs[TIPC_NLA_BEARER_NAME]) | |
857 | return -EINVAL; | |
858 | name = nla_data(attrs[TIPC_NLA_BEARER_NAME]); | |
859 | ||
860 | rtnl_lock(); | |
7f9f95d9 | 861 | b = tipc_bearer_find(net, name); |
315c00bc RA |
862 | if (!b) { |
863 | rtnl_unlock(); | |
864 | return -EINVAL; | |
865 | } | |
866 | ||
867 | if (attrs[TIPC_NLA_BEARER_PROP]) { | |
868 | struct nlattr *props[TIPC_NLA_PROP_MAX + 1]; | |
869 | ||
870 | err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_BEARER_PROP], | |
871 | props); | |
872 | if (err) { | |
873 | rtnl_unlock(); | |
874 | return err; | |
875 | } | |
876 | ||
877 | if (props[TIPC_NLA_PROP_TOL]) | |
878 | b->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]); | |
879 | if (props[TIPC_NLA_PROP_PRIO]) | |
880 | b->priority = nla_get_u32(props[TIPC_NLA_PROP_PRIO]); | |
881 | if (props[TIPC_NLA_PROP_WIN]) | |
882 | b->window = nla_get_u32(props[TIPC_NLA_PROP_WIN]); | |
883 | } | |
884 | rtnl_unlock(); | |
885 | ||
886 | return 0; | |
887 | } | |
46f15c67 | 888 | |
d8182804 | 889 | static int __tipc_nl_add_media(struct tipc_nl_msg *msg, |
f2f67390 | 890 | struct tipc_media *media, int nlflags) |
46f15c67 RA |
891 | { |
892 | void *hdr; | |
893 | struct nlattr *attrs; | |
894 | struct nlattr *prop; | |
895 | ||
bfb3e5dd | 896 | hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family, |
f2f67390 | 897 | nlflags, TIPC_NL_MEDIA_GET); |
46f15c67 RA |
898 | if (!hdr) |
899 | return -EMSGSIZE; | |
900 | ||
901 | attrs = nla_nest_start(msg->skb, TIPC_NLA_MEDIA); | |
902 | if (!attrs) | |
903 | goto msg_full; | |
904 | ||
905 | if (nla_put_string(msg->skb, TIPC_NLA_MEDIA_NAME, media->name)) | |
906 | goto attr_msg_full; | |
907 | ||
908 | prop = nla_nest_start(msg->skb, TIPC_NLA_MEDIA_PROP); | |
909 | if (!prop) | |
910 | goto prop_msg_full; | |
911 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, media->priority)) | |
912 | goto prop_msg_full; | |
913 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, media->tolerance)) | |
914 | goto prop_msg_full; | |
915 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, media->window)) | |
916 | goto prop_msg_full; | |
917 | ||
918 | nla_nest_end(msg->skb, prop); | |
919 | nla_nest_end(msg->skb, attrs); | |
920 | genlmsg_end(msg->skb, hdr); | |
921 | ||
922 | return 0; | |
923 | ||
924 | prop_msg_full: | |
925 | nla_nest_cancel(msg->skb, prop); | |
926 | attr_msg_full: | |
927 | nla_nest_cancel(msg->skb, attrs); | |
928 | msg_full: | |
929 | genlmsg_cancel(msg->skb, hdr); | |
930 | ||
931 | return -EMSGSIZE; | |
932 | } | |
933 | ||
934 | int tipc_nl_media_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
935 | { | |
936 | int err; | |
937 | int i = cb->args[0]; | |
938 | struct tipc_nl_msg msg; | |
939 | ||
940 | if (i == MAX_MEDIA) | |
941 | return 0; | |
942 | ||
943 | msg.skb = skb; | |
944 | msg.portid = NETLINK_CB(cb->skb).portid; | |
945 | msg.seq = cb->nlh->nlmsg_seq; | |
946 | ||
947 | rtnl_lock(); | |
948 | for (; media_info_array[i] != NULL; i++) { | |
f2f67390 ND |
949 | err = __tipc_nl_add_media(&msg, media_info_array[i], |
950 | NLM_F_MULTI); | |
46f15c67 RA |
951 | if (err) |
952 | break; | |
953 | } | |
954 | rtnl_unlock(); | |
955 | ||
956 | cb->args[0] = i; | |
957 | return skb->len; | |
958 | } | |
959 | ||
960 | int tipc_nl_media_get(struct sk_buff *skb, struct genl_info *info) | |
961 | { | |
962 | int err; | |
963 | char *name; | |
964 | struct tipc_nl_msg msg; | |
965 | struct tipc_media *media; | |
966 | struct sk_buff *rep; | |
967 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
968 | ||
969 | if (!info->attrs[TIPC_NLA_MEDIA]) | |
970 | return -EINVAL; | |
971 | ||
972 | err = nla_parse_nested(attrs, TIPC_NLA_MEDIA_MAX, | |
973 | info->attrs[TIPC_NLA_MEDIA], | |
974 | tipc_nl_media_policy); | |
975 | if (err) | |
976 | return err; | |
977 | ||
978 | if (!attrs[TIPC_NLA_MEDIA_NAME]) | |
979 | return -EINVAL; | |
980 | name = nla_data(attrs[TIPC_NLA_MEDIA_NAME]); | |
981 | ||
982 | rep = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); | |
983 | if (!rep) | |
984 | return -ENOMEM; | |
985 | ||
986 | msg.skb = rep; | |
987 | msg.portid = info->snd_portid; | |
988 | msg.seq = info->snd_seq; | |
989 | ||
990 | rtnl_lock(); | |
991 | media = tipc_media_find(name); | |
992 | if (!media) { | |
993 | err = -EINVAL; | |
994 | goto err_out; | |
995 | } | |
996 | ||
f2f67390 | 997 | err = __tipc_nl_add_media(&msg, media, 0); |
46f15c67 RA |
998 | if (err) |
999 | goto err_out; | |
1000 | rtnl_unlock(); | |
1001 | ||
1002 | return genlmsg_reply(rep, info); | |
1003 | err_out: | |
1004 | rtnl_unlock(); | |
1005 | nlmsg_free(rep); | |
1006 | ||
1007 | return err; | |
1008 | } | |
1e55417d RA |
1009 | |
1010 | int tipc_nl_media_set(struct sk_buff *skb, struct genl_info *info) | |
1011 | { | |
1012 | int err; | |
1013 | char *name; | |
1014 | struct tipc_media *m; | |
1015 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
1016 | ||
1017 | if (!info->attrs[TIPC_NLA_MEDIA]) | |
1018 | return -EINVAL; | |
1019 | ||
1020 | err = nla_parse_nested(attrs, TIPC_NLA_MEDIA_MAX, | |
1021 | info->attrs[TIPC_NLA_MEDIA], | |
1022 | tipc_nl_media_policy); | |
1023 | ||
1024 | if (!attrs[TIPC_NLA_MEDIA_NAME]) | |
1025 | return -EINVAL; | |
1026 | name = nla_data(attrs[TIPC_NLA_MEDIA_NAME]); | |
1027 | ||
1028 | rtnl_lock(); | |
1029 | m = tipc_media_find(name); | |
1030 | if (!m) { | |
1031 | rtnl_unlock(); | |
1032 | return -EINVAL; | |
1033 | } | |
1034 | ||
1035 | if (attrs[TIPC_NLA_MEDIA_PROP]) { | |
1036 | struct nlattr *props[TIPC_NLA_PROP_MAX + 1]; | |
1037 | ||
1038 | err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_MEDIA_PROP], | |
1039 | props); | |
1040 | if (err) { | |
1041 | rtnl_unlock(); | |
1042 | return err; | |
1043 | } | |
1044 | ||
1045 | if (props[TIPC_NLA_PROP_TOL]) | |
1046 | m->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]); | |
1047 | if (props[TIPC_NLA_PROP_PRIO]) | |
1048 | m->priority = nla_get_u32(props[TIPC_NLA_PROP_PRIO]); | |
1049 | if (props[TIPC_NLA_PROP_WIN]) | |
1050 | m->window = nla_get_u32(props[TIPC_NLA_PROP_WIN]); | |
1051 | } | |
1052 | rtnl_unlock(); | |
1053 | ||
1054 | return 0; | |
1055 | } |