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Commit | Line | Data |
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b97bf3fd PL |
1 | /* |
2 | * net/tipc/bearer.c: TIPC bearer code | |
c4307285 | 3 | * |
35c55c98 | 4 | * Copyright (c) 1996-2006, 2013-2016, 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" |
35c55c98 | 42 | #include "monitor.h" |
1da46568 | 43 | #include "bcast.h" |
49cc66ea | 44 | #include "netlink.h" |
ef20cd4d | 45 | #include "udp_media.h" |
b97bf3fd | 46 | |
a29a194a | 47 | #define MAX_ADDR_STR 60 |
b97bf3fd | 48 | |
ef72a7e0 | 49 | static struct tipc_media * const media_info_array[] = { |
5702dbab JPM |
50 | ð_media_info, |
51 | #ifdef CONFIG_TIPC_MEDIA_IB | |
52 | &ib_media_info, | |
d0f91938 EH |
53 | #endif |
54 | #ifdef CONFIG_TIPC_MEDIA_UDP | |
55 | &udp_media_info, | |
5702dbab JPM |
56 | #endif |
57 | NULL | |
58 | }; | |
b97bf3fd | 59 | |
0d051bf9 JPM |
60 | static struct tipc_bearer *bearer_get(struct net *net, int bearer_id) |
61 | { | |
62 | struct tipc_net *tn = tipc_net(net); | |
63 | ||
64 | return rcu_dereference_rtnl(tn->bearer_list[bearer_id]); | |
65 | } | |
66 | ||
1a90632d | 67 | static void bearer_disable(struct net *net, struct tipc_bearer *b); |
d55c60eb PB |
68 | static int tipc_l2_rcv_msg(struct sk_buff *skb, struct net_device *dev, |
69 | struct packet_type *pt, struct net_device *orig_dev); | |
3a777ff8 | 70 | |
b97bf3fd | 71 | /** |
5c216e1d | 72 | * tipc_media_find - locates specified media object by name |
b97bf3fd | 73 | */ |
358a0d1c | 74 | struct tipc_media *tipc_media_find(const char *name) |
b97bf3fd | 75 | { |
b97bf3fd PL |
76 | u32 i; |
77 | ||
ef72a7e0 JPM |
78 | for (i = 0; media_info_array[i] != NULL; i++) { |
79 | if (!strcmp(media_info_array[i]->name, name)) | |
5702dbab | 80 | break; |
b97bf3fd | 81 | } |
ef72a7e0 | 82 | return media_info_array[i]; |
b97bf3fd PL |
83 | } |
84 | ||
c79be454 AS |
85 | /** |
86 | * media_find_id - locates specified media object by type identifier | |
87 | */ | |
358a0d1c | 88 | static struct tipc_media *media_find_id(u8 type) |
c79be454 AS |
89 | { |
90 | u32 i; | |
91 | ||
ef72a7e0 JPM |
92 | for (i = 0; media_info_array[i] != NULL; i++) { |
93 | if (media_info_array[i]->type_id == type) | |
5702dbab | 94 | break; |
c79be454 | 95 | } |
ef72a7e0 | 96 | return media_info_array[i]; |
b97bf3fd PL |
97 | } |
98 | ||
99 | /** | |
4323add6 | 100 | * tipc_media_addr_printf - record media address in print buffer |
b97bf3fd | 101 | */ |
dc1aed37 | 102 | void tipc_media_addr_printf(char *buf, int len, struct tipc_media_addr *a) |
b97bf3fd | 103 | { |
c61b666e | 104 | char addr_str[MAX_ADDR_STR]; |
1a90632d | 105 | struct tipc_media *m; |
dc1aed37 | 106 | int ret; |
b97bf3fd | 107 | |
1a90632d | 108 | m = media_find_id(a->media_id); |
b97bf3fd | 109 | |
1a90632d JPM |
110 | if (m && !m->addr2str(a, addr_str, sizeof(addr_str))) |
111 | ret = scnprintf(buf, len, "%s(%s)", m->name, addr_str); | |
c61b666e | 112 | else { |
c61b666e | 113 | u32 i; |
b97bf3fd | 114 | |
941787b8 | 115 | ret = scnprintf(buf, len, "UNKNOWN(%u)", a->media_id); |
3d749a6a | 116 | for (i = 0; i < sizeof(a->value); i++) |
941787b8 | 117 | ret += scnprintf(buf - ret, len + ret, |
dc1aed37 | 118 | "-%02x", a->value[i]); |
b97bf3fd PL |
119 | } |
120 | } | |
121 | ||
b97bf3fd PL |
122 | /** |
123 | * bearer_name_validate - validate & (optionally) deconstruct bearer name | |
2c53040f BH |
124 | * @name: ptr to bearer name string |
125 | * @name_parts: ptr to area for bearer name components (or NULL if not needed) | |
c4307285 | 126 | * |
b97bf3fd PL |
127 | * Returns 1 if bearer name is valid, otherwise 0. |
128 | */ | |
c4307285 | 129 | static int bearer_name_validate(const char *name, |
f19765f4 | 130 | struct tipc_bearer_names *name_parts) |
b97bf3fd PL |
131 | { |
132 | char name_copy[TIPC_MAX_BEARER_NAME]; | |
133 | char *media_name; | |
134 | char *if_name; | |
135 | u32 media_len; | |
136 | u32 if_len; | |
137 | ||
138 | /* copy bearer name & ensure length is OK */ | |
b97bf3fd PL |
139 | name_copy[TIPC_MAX_BEARER_NAME - 1] = 0; |
140 | /* need above in case non-Posix strncpy() doesn't pad with nulls */ | |
141 | strncpy(name_copy, name, TIPC_MAX_BEARER_NAME); | |
142 | if (name_copy[TIPC_MAX_BEARER_NAME - 1] != 0) | |
143 | return 0; | |
144 | ||
145 | /* ensure all component parts of bearer name are present */ | |
b97bf3fd | 146 | media_name = name_copy; |
2db9983a AS |
147 | if_name = strchr(media_name, ':'); |
148 | if (if_name == NULL) | |
b97bf3fd PL |
149 | return 0; |
150 | *(if_name++) = 0; | |
151 | media_len = if_name - media_name; | |
152 | if_len = strlen(if_name) + 1; | |
153 | ||
154 | /* validate component parts of bearer name */ | |
c4307285 | 155 | if ((media_len <= 1) || (media_len > TIPC_MAX_MEDIA_NAME) || |
fc073938 | 156 | (if_len <= 1) || (if_len > TIPC_MAX_IF_NAME)) |
b97bf3fd PL |
157 | return 0; |
158 | ||
159 | /* return bearer name components, if necessary */ | |
b97bf3fd PL |
160 | if (name_parts) { |
161 | strcpy(name_parts->media_name, media_name); | |
162 | strcpy(name_parts->if_name, if_name); | |
163 | } | |
164 | return 1; | |
165 | } | |
166 | ||
167 | /** | |
5c216e1d | 168 | * tipc_bearer_find - locates bearer object with matching bearer name |
b97bf3fd | 169 | */ |
7f9f95d9 | 170 | struct tipc_bearer *tipc_bearer_find(struct net *net, const char *name) |
b97bf3fd | 171 | { |
7f9f95d9 | 172 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
1a90632d | 173 | struct tipc_bearer *b; |
b97bf3fd PL |
174 | u32 i; |
175 | ||
3874ccbb | 176 | for (i = 0; i < MAX_BEARERS; i++) { |
1a90632d JPM |
177 | b = rtnl_dereference(tn->bearer_list[i]); |
178 | if (b && (!strcmp(b->name, name))) | |
179 | return b; | |
b97bf3fd | 180 | } |
1fc54d8f | 181 | return NULL; |
b97bf3fd PL |
182 | } |
183 | ||
ff0d3e78 PB |
184 | /* tipc_bearer_get_name - get the bearer name from its id. |
185 | * @net: network namespace | |
186 | * @name: a pointer to the buffer where the name will be stored. | |
187 | * @bearer_id: the id to get the name from. | |
188 | */ | |
189 | int tipc_bearer_get_name(struct net *net, char *name, u32 bearer_id) | |
190 | { | |
191 | struct tipc_net *tn = tipc_net(net); | |
192 | struct tipc_bearer *b; | |
193 | ||
194 | if (bearer_id >= MAX_BEARERS) | |
195 | return -EINVAL; | |
196 | ||
197 | b = rtnl_dereference(tn->bearer_list[bearer_id]); | |
198 | if (!b) | |
199 | return -EINVAL; | |
200 | ||
201 | strcpy(name, b->name); | |
202 | return 0; | |
203 | } | |
204 | ||
7f9f95d9 | 205 | void tipc_bearer_add_dest(struct net *net, u32 bearer_id, u32 dest) |
b97bf3fd | 206 | { |
7f9f95d9 | 207 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
1a90632d | 208 | struct tipc_bearer *b; |
7a2f7d18 YX |
209 | |
210 | rcu_read_lock(); | |
1a90632d JPM |
211 | b = rcu_dereference_rtnl(tn->bearer_list[bearer_id]); |
212 | if (b) | |
213 | tipc_disc_add_dest(b->link_req); | |
7a2f7d18 | 214 | rcu_read_unlock(); |
b97bf3fd PL |
215 | } |
216 | ||
7f9f95d9 | 217 | void tipc_bearer_remove_dest(struct net *net, u32 bearer_id, u32 dest) |
b97bf3fd | 218 | { |
7f9f95d9 | 219 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
1a90632d | 220 | struct tipc_bearer *b; |
7a2f7d18 YX |
221 | |
222 | rcu_read_lock(); | |
1a90632d JPM |
223 | b = rcu_dereference_rtnl(tn->bearer_list[bearer_id]); |
224 | if (b) | |
225 | tipc_disc_remove_dest(b->link_req); | |
7a2f7d18 | 226 | rcu_read_unlock(); |
b97bf3fd PL |
227 | } |
228 | ||
b97bf3fd PL |
229 | /** |
230 | * tipc_enable_bearer - enable bearer with the given name | |
c4307285 | 231 | */ |
9ab15465 | 232 | static int tipc_enable_bearer(struct net *net, const char *name, |
d0f91938 EH |
233 | u32 disc_domain, u32 priority, |
234 | struct nlattr *attr[]) | |
b97bf3fd | 235 | { |
7f9f95d9 | 236 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
1a90632d JPM |
237 | struct tipc_bearer *b; |
238 | struct tipc_media *m; | |
f19765f4 | 239 | struct tipc_bearer_names b_names; |
4e801fa1 | 240 | struct sk_buff *skb; |
b97bf3fd PL |
241 | char addr_string[16]; |
242 | u32 bearer_id; | |
243 | u32 with_this_prio; | |
244 | u32 i; | |
245 | int res = -EINVAL; | |
246 | ||
34747539 | 247 | if (!tn->own_addr) { |
2cf8aa19 EH |
248 | pr_warn("Bearer <%s> rejected, not supported in standalone mode\n", |
249 | name); | |
b97bf3fd | 250 | return -ENOPROTOOPT; |
a10bd924 | 251 | } |
f19765f4 | 252 | if (!bearer_name_validate(name, &b_names)) { |
2cf8aa19 | 253 | pr_warn("Bearer <%s> rejected, illegal name\n", name); |
16cb4b33 | 254 | return -EINVAL; |
a10bd924 | 255 | } |
66e019a6 | 256 | if (tipc_addr_domain_valid(disc_domain) && |
34747539 YX |
257 | (disc_domain != tn->own_addr)) { |
258 | if (tipc_in_scope(disc_domain, tn->own_addr)) { | |
9ff26e9f | 259 | disc_domain = tn->own_addr & TIPC_ZONE_CLUSTER_MASK; |
66e019a6 | 260 | res = 0; /* accept any node in own cluster */ |
34747539 | 261 | } else if (in_own_cluster_exact(net, disc_domain)) |
66e019a6 AS |
262 | res = 0; /* accept specified node in own cluster */ |
263 | } | |
264 | if (res) { | |
2cf8aa19 EH |
265 | pr_warn("Bearer <%s> rejected, illegal discovery domain\n", |
266 | name); | |
a10bd924 AS |
267 | return -EINVAL; |
268 | } | |
9efde4a0 | 269 | if ((priority > TIPC_MAX_LINK_PRI) && |
a10bd924 | 270 | (priority != TIPC_MEDIA_LINK_PRI)) { |
2cf8aa19 | 271 | pr_warn("Bearer <%s> rejected, illegal priority\n", name); |
b97bf3fd | 272 | return -EINVAL; |
a10bd924 | 273 | } |
b97bf3fd | 274 | |
1a90632d JPM |
275 | m = tipc_media_find(b_names.media_name); |
276 | if (!m) { | |
2cf8aa19 EH |
277 | pr_warn("Bearer <%s> rejected, media <%s> not registered\n", |
278 | name, b_names.media_name); | |
7216cd94 | 279 | return -EINVAL; |
b97bf3fd | 280 | } |
16cb4b33 PL |
281 | |
282 | if (priority == TIPC_MEDIA_LINK_PRI) | |
1a90632d | 283 | priority = m->priority; |
b97bf3fd PL |
284 | |
285 | restart: | |
286 | bearer_id = MAX_BEARERS; | |
287 | with_this_prio = 1; | |
288 | for (i = MAX_BEARERS; i-- != 0; ) { | |
1a90632d JPM |
289 | b = rtnl_dereference(tn->bearer_list[i]); |
290 | if (!b) { | |
b97bf3fd PL |
291 | bearer_id = i; |
292 | continue; | |
293 | } | |
1a90632d | 294 | if (!strcmp(name, b->name)) { |
2cf8aa19 EH |
295 | pr_warn("Bearer <%s> rejected, already enabled\n", |
296 | name); | |
7216cd94 | 297 | return -EINVAL; |
b97bf3fd | 298 | } |
1a90632d | 299 | if ((b->priority == priority) && |
b97bf3fd PL |
300 | (++with_this_prio > 2)) { |
301 | if (priority-- == 0) { | |
2cf8aa19 EH |
302 | pr_warn("Bearer <%s> rejected, duplicate priority\n", |
303 | name); | |
7216cd94 | 304 | return -EINVAL; |
b97bf3fd | 305 | } |
2cf8aa19 EH |
306 | pr_warn("Bearer <%s> priority adjustment required %u->%u\n", |
307 | name, priority + 1, priority); | |
b97bf3fd PL |
308 | goto restart; |
309 | } | |
310 | } | |
311 | if (bearer_id >= MAX_BEARERS) { | |
2cf8aa19 EH |
312 | pr_warn("Bearer <%s> rejected, bearer limit reached (%u)\n", |
313 | name, MAX_BEARERS); | |
7216cd94 | 314 | return -EINVAL; |
b97bf3fd PL |
315 | } |
316 | ||
1a90632d JPM |
317 | b = kzalloc(sizeof(*b), GFP_ATOMIC); |
318 | if (!b) | |
7216cd94 YX |
319 | return -ENOMEM; |
320 | ||
1a90632d JPM |
321 | strcpy(b->name, name); |
322 | b->media = m; | |
323 | res = m->enable_media(net, b, attr); | |
b97bf3fd | 324 | if (res) { |
2cf8aa19 EH |
325 | pr_warn("Bearer <%s> rejected, enable failure (%d)\n", |
326 | name, -res); | |
7216cd94 | 327 | return -EINVAL; |
b97bf3fd PL |
328 | } |
329 | ||
1a90632d JPM |
330 | b->identity = bearer_id; |
331 | b->tolerance = m->tolerance; | |
332 | b->window = m->window; | |
333 | b->domain = disc_domain; | |
334 | b->net_plane = bearer_id + 'A'; | |
335 | b->priority = priority; | |
0d051bf9 | 336 | test_and_set_bit_lock(0, &b->up); |
3a777ff8 | 337 | |
4e801fa1 | 338 | res = tipc_disc_create(net, b, &b->bcast_addr, &skb); |
3a777ff8 | 339 | if (res) { |
1a90632d | 340 | bearer_disable(net, b); |
2cf8aa19 EH |
341 | pr_warn("Bearer <%s> rejected, discovery object creation failed\n", |
342 | name); | |
7216cd94 | 343 | return -EINVAL; |
3a777ff8 | 344 | } |
3874ccbb | 345 | |
1a90632d | 346 | rcu_assign_pointer(tn->bearer_list[bearer_id], b); |
4e801fa1 JPM |
347 | if (skb) |
348 | tipc_bearer_xmit_skb(net, bearer_id, skb, &b->bcast_addr); | |
35c55c98 JPM |
349 | |
350 | if (tipc_mon_create(net, bearer_id)) | |
351 | return -ENOMEM; | |
352 | ||
2cf8aa19 EH |
353 | pr_info("Enabled bearer <%s>, discovery domain %s, priority %u\n", |
354 | name, | |
355 | tipc_addr_string_fill(addr_string, disc_domain), priority); | |
b97bf3fd PL |
356 | return res; |
357 | } | |
358 | ||
359 | /** | |
512137ee | 360 | * tipc_reset_bearer - Reset all links established over this bearer |
b97bf3fd | 361 | */ |
1a90632d | 362 | static int tipc_reset_bearer(struct net *net, struct tipc_bearer *b) |
b97bf3fd | 363 | { |
1a90632d JPM |
364 | pr_info("Resetting bearer <%s>\n", b->name); |
365 | tipc_node_delete_links(net, b->identity); | |
366 | tipc_disc_reset(net, b); | |
0e35fd5e | 367 | return 0; |
b97bf3fd PL |
368 | } |
369 | ||
1fc07f3e JPM |
370 | /* tipc_bearer_reset_all - reset all links on all bearers |
371 | */ | |
372 | void tipc_bearer_reset_all(struct net *net) | |
373 | { | |
1fc07f3e JPM |
374 | struct tipc_bearer *b; |
375 | int i; | |
376 | ||
377 | for (i = 0; i < MAX_BEARERS; i++) { | |
0d051bf9 JPM |
378 | b = bearer_get(net, i); |
379 | if (b) | |
380 | clear_bit_unlock(0, &b->up); | |
381 | } | |
382 | for (i = 0; i < MAX_BEARERS; i++) { | |
383 | b = bearer_get(net, i); | |
1fc07f3e JPM |
384 | if (b) |
385 | tipc_reset_bearer(net, b); | |
386 | } | |
0d051bf9 JPM |
387 | for (i = 0; i < MAX_BEARERS; i++) { |
388 | b = bearer_get(net, i); | |
389 | if (b) | |
390 | test_and_set_bit_lock(0, &b->up); | |
391 | } | |
1fc07f3e JPM |
392 | } |
393 | ||
b97bf3fd | 394 | /** |
617d3c7a | 395 | * bearer_disable |
c4307285 | 396 | * |
7216cd94 | 397 | * Note: This routine assumes caller holds RTNL lock. |
b97bf3fd | 398 | */ |
1a90632d | 399 | static void bearer_disable(struct net *net, struct tipc_bearer *b) |
b97bf3fd | 400 | { |
5b7066c3 JPM |
401 | struct tipc_net *tn = tipc_net(net); |
402 | int bearer_id = b->identity; | |
3874ccbb | 403 | |
1a90632d | 404 | pr_info("Disabling bearer <%s>\n", b->name); |
0d051bf9 | 405 | clear_bit_unlock(0, &b->up); |
5b7066c3 | 406 | tipc_node_delete_links(net, bearer_id); |
0d051bf9 | 407 | b->media->disable_media(b); |
1a90632d JPM |
408 | RCU_INIT_POINTER(b->media_ptr, NULL); |
409 | if (b->link_req) | |
410 | tipc_disc_delete(b->link_req); | |
5b7066c3 | 411 | RCU_INIT_POINTER(tn->bearer_list[bearer_id], NULL); |
1a90632d | 412 | kfree_rcu(b, rcu); |
35c55c98 | 413 | tipc_mon_delete(net, bearer_id); |
b97bf3fd PL |
414 | } |
415 | ||
d0f91938 EH |
416 | int tipc_enable_l2_media(struct net *net, struct tipc_bearer *b, |
417 | struct nlattr *attr[]) | |
e4d050cb YX |
418 | { |
419 | struct net_device *dev; | |
420 | char *driver_name = strchr((const char *)b->name, ':') + 1; | |
421 | ||
422 | /* Find device with specified name */ | |
7f9f95d9 | 423 | dev = dev_get_by_name(net, driver_name); |
e4d050cb YX |
424 | if (!dev) |
425 | return -ENODEV; | |
3de81b75 MK |
426 | if (tipc_mtu_bad(dev, 0)) { |
427 | dev_put(dev); | |
428 | return -EINVAL; | |
429 | } | |
e4d050cb | 430 | |
38504c28 | 431 | /* Associate TIPC bearer with L2 bearer */ |
2231c5af | 432 | rcu_assign_pointer(b->media_ptr, dev); |
d55c60eb PB |
433 | b->pt.dev = dev; |
434 | b->pt.type = htons(ETH_P_TIPC); | |
435 | b->pt.func = tipc_l2_rcv_msg; | |
436 | dev_add_pack(&b->pt); | |
38504c28 | 437 | memset(&b->bcast_addr, 0, sizeof(b->bcast_addr)); |
e4d050cb YX |
438 | memcpy(b->bcast_addr.value, dev->broadcast, b->media->hwaddr_len); |
439 | b->bcast_addr.media_id = b->media->type_id; | |
9999974a | 440 | b->bcast_addr.broadcast = TIPC_BROADCAST_SUPPORT; |
e4d050cb | 441 | b->mtu = dev->mtu; |
38504c28 | 442 | b->media->raw2addr(b, &b->addr, (char *)dev->dev_addr); |
e4d050cb YX |
443 | rcu_assign_pointer(dev->tipc_ptr, b); |
444 | return 0; | |
445 | } | |
446 | ||
38504c28 | 447 | /* tipc_disable_l2_media - detach TIPC bearer from an L2 interface |
e4d050cb | 448 | * |
282b3a05 | 449 | * Mark L2 bearer as inactive so that incoming buffers are thrown away |
e4d050cb YX |
450 | */ |
451 | void tipc_disable_l2_media(struct tipc_bearer *b) | |
452 | { | |
2231c5af YX |
453 | struct net_device *dev; |
454 | ||
455 | dev = (struct net_device *)rtnl_dereference(b->media_ptr); | |
d55c60eb | 456 | dev_remove_pack(&b->pt); |
e4d050cb | 457 | RCU_INIT_POINTER(dev->tipc_ptr, NULL); |
f1c8d8cb | 458 | synchronize_net(); |
e4d050cb YX |
459 | dev_put(dev); |
460 | } | |
461 | ||
462 | /** | |
38504c28 | 463 | * tipc_l2_send_msg - send a TIPC packet out over an L2 interface |
5b7066c3 | 464 | * @skb: the packet to be sent |
1a90632d | 465 | * @b: the bearer through which the packet is to be sent |
e4d050cb YX |
466 | * @dest: peer destination address |
467 | */ | |
7214bcf8 | 468 | int tipc_l2_send_msg(struct net *net, struct sk_buff *skb, |
1da46568 | 469 | struct tipc_bearer *b, struct tipc_media_addr *dest) |
e4d050cb | 470 | { |
2231c5af | 471 | struct net_device *dev; |
e4d050cb | 472 | int delta; |
2231c5af YX |
473 | |
474 | dev = (struct net_device *)rcu_dereference_rtnl(b->media_ptr); | |
475 | if (!dev) | |
476 | return 0; | |
e4d050cb | 477 | |
0d051bf9 JPM |
478 | delta = SKB_DATA_ALIGN(dev->hard_header_len - skb_headroom(skb)); |
479 | if ((delta > 0) && pskb_expand_head(skb, delta, 0, GFP_ATOMIC)) { | |
480 | kfree_skb(skb); | |
481 | return 0; | |
482 | } | |
7214bcf8 JPM |
483 | skb_reset_network_header(skb); |
484 | skb->dev = dev; | |
485 | skb->protocol = htons(ETH_P_TIPC); | |
486 | dev_hard_header(skb, dev, ETH_P_TIPC, dest->value, | |
487 | dev->dev_addr, skb->len); | |
488 | dev_queue_xmit(skb); | |
e4d050cb YX |
489 | return 0; |
490 | } | |
491 | ||
9999974a JPM |
492 | bool tipc_bearer_bcast_support(struct net *net, u32 bearer_id) |
493 | { | |
494 | bool supp = false; | |
495 | struct tipc_bearer *b; | |
496 | ||
497 | rcu_read_lock(); | |
498 | b = bearer_get(net, bearer_id); | |
499 | if (b) | |
500 | supp = (b->bcast_addr.broadcast == TIPC_BROADCAST_SUPPORT); | |
501 | rcu_read_unlock(); | |
502 | return supp; | |
503 | } | |
504 | ||
959e1781 JPM |
505 | int tipc_bearer_mtu(struct net *net, u32 bearer_id) |
506 | { | |
507 | int mtu = 0; | |
508 | struct tipc_bearer *b; | |
509 | ||
510 | rcu_read_lock(); | |
511 | b = rcu_dereference_rtnl(tipc_net(net)->bearer_list[bearer_id]); | |
512 | if (b) | |
513 | mtu = b->mtu; | |
514 | rcu_read_unlock(); | |
515 | return mtu; | |
516 | } | |
517 | ||
60852d67 JPM |
518 | /* tipc_bearer_xmit_skb - sends buffer to destination over bearer |
519 | */ | |
520 | void tipc_bearer_xmit_skb(struct net *net, u32 bearer_id, | |
521 | struct sk_buff *skb, | |
522 | struct tipc_media_addr *dest) | |
523 | { | |
0d051bf9 | 524 | struct tipc_msg *hdr = buf_msg(skb); |
60852d67 JPM |
525 | struct tipc_bearer *b; |
526 | ||
527 | rcu_read_lock(); | |
0d051bf9 JPM |
528 | b = bearer_get(net, bearer_id); |
529 | if (likely(b && (test_bit(0, &b->up) || msg_is_reset(hdr)))) | |
60852d67 | 530 | b->media->send_msg(net, skb, b, dest); |
4e801fa1 JPM |
531 | else |
532 | kfree_skb(skb); | |
60852d67 | 533 | rcu_read_unlock(); |
60852d67 JPM |
534 | } |
535 | ||
af9b028e JPM |
536 | /* tipc_bearer_xmit() -send buffer to destination over bearer |
537 | */ | |
538 | void tipc_bearer_xmit(struct net *net, u32 bearer_id, | |
539 | struct sk_buff_head *xmitq, | |
540 | struct tipc_media_addr *dst) | |
541 | { | |
af9b028e JPM |
542 | struct tipc_bearer *b; |
543 | struct sk_buff *skb, *tmp; | |
544 | ||
545 | if (skb_queue_empty(xmitq)) | |
546 | return; | |
547 | ||
548 | rcu_read_lock(); | |
0d051bf9 | 549 | b = bearer_get(net, bearer_id); |
4e801fa1 JPM |
550 | if (unlikely(!b)) |
551 | __skb_queue_purge(xmitq); | |
552 | skb_queue_walk_safe(xmitq, skb, tmp) { | |
553 | __skb_dequeue(xmitq); | |
0d051bf9 JPM |
554 | if (likely(test_bit(0, &b->up) || msg_is_reset(buf_msg(skb)))) |
555 | b->media->send_msg(net, skb, b, dst); | |
556 | else | |
5128b185 | 557 | kfree_skb(skb); |
b06b281e JPM |
558 | } |
559 | rcu_read_unlock(); | |
560 | } | |
561 | ||
562 | /* tipc_bearer_bc_xmit() - broadcast buffers to all destinations | |
563 | */ | |
564 | void tipc_bearer_bc_xmit(struct net *net, u32 bearer_id, | |
565 | struct sk_buff_head *xmitq) | |
566 | { | |
567 | struct tipc_net *tn = tipc_net(net); | |
568 | int net_id = tn->net_id; | |
569 | struct tipc_bearer *b; | |
570 | struct sk_buff *skb, *tmp; | |
571 | struct tipc_msg *hdr; | |
572 | ||
573 | rcu_read_lock(); | |
0d051bf9 JPM |
574 | b = bearer_get(net, bearer_id); |
575 | if (unlikely(!b || !test_bit(0, &b->up))) | |
4e801fa1 JPM |
576 | __skb_queue_purge(xmitq); |
577 | skb_queue_walk_safe(xmitq, skb, tmp) { | |
578 | hdr = buf_msg(skb); | |
579 | msg_set_non_seq(hdr, 1); | |
580 | msg_set_mc_netid(hdr, net_id); | |
581 | __skb_dequeue(xmitq); | |
582 | b->media->send_msg(net, skb, b, &b->bcast_addr); | |
af9b028e JPM |
583 | } |
584 | rcu_read_unlock(); | |
585 | } | |
586 | ||
6e967adf YX |
587 | /** |
588 | * tipc_l2_rcv_msg - handle incoming TIPC message from an interface | |
589 | * @buf: the received packet | |
590 | * @dev: the net device that the packet was received on | |
591 | * @pt: the packet_type structure which was used to register this handler | |
592 | * @orig_dev: the original receive net device in case the device is a bond | |
593 | * | |
594 | * Accept only packets explicitly sent to this node, or broadcast packets; | |
595 | * ignores packets sent using interface multicast, and traffic sent to other | |
596 | * nodes (which can happen if interface is running in promiscuous mode). | |
597 | */ | |
4e801fa1 | 598 | static int tipc_l2_rcv_msg(struct sk_buff *skb, struct net_device *dev, |
6e967adf YX |
599 | struct packet_type *pt, struct net_device *orig_dev) |
600 | { | |
1a90632d | 601 | struct tipc_bearer *b; |
6e967adf | 602 | |
6e967adf | 603 | rcu_read_lock(); |
d55c60eb PB |
604 | b = rcu_dereference_rtnl(dev->tipc_ptr) ?: |
605 | rcu_dereference_rtnl(orig_dev->tipc_ptr); | |
0d051bf9 | 606 | if (likely(b && test_bit(0, &b->up) && |
fed5f571 | 607 | (skb->pkt_type <= PACKET_MULTICAST))) { |
4e801fa1 | 608 | skb->next = NULL; |
d55c60eb | 609 | tipc_rcv(dev_net(b->pt.dev), skb, b); |
4e801fa1 JPM |
610 | rcu_read_unlock(); |
611 | return NET_RX_SUCCESS; | |
6e967adf YX |
612 | } |
613 | rcu_read_unlock(); | |
4e801fa1 | 614 | kfree_skb(skb); |
6e967adf YX |
615 | return NET_RX_DROP; |
616 | } | |
617 | ||
618 | /** | |
619 | * tipc_l2_device_event - handle device events from network device | |
620 | * @nb: the context of the notification | |
621 | * @evt: the type of event | |
622 | * @ptr: the net device that the event was on | |
623 | * | |
624 | * This function is called by the Ethernet driver in case of link | |
625 | * change event. | |
626 | */ | |
627 | static int tipc_l2_device_event(struct notifier_block *nb, unsigned long evt, | |
628 | void *ptr) | |
629 | { | |
6e967adf | 630 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
c93d3baa | 631 | struct net *net = dev_net(dev); |
1a90632d | 632 | struct tipc_bearer *b; |
6e967adf | 633 | |
1a90632d JPM |
634 | b = rtnl_dereference(dev->tipc_ptr); |
635 | if (!b) | |
6e967adf | 636 | return NOTIFY_DONE; |
6e967adf | 637 | |
6e967adf YX |
638 | switch (evt) { |
639 | case NETDEV_CHANGE: | |
640 | if (netif_carrier_ok(dev)) | |
641 | break; | |
5b7066c3 | 642 | case NETDEV_UP: |
0d051bf9 | 643 | test_and_set_bit_lock(0, &b->up); |
5b7066c3 | 644 | break; |
282b3a05 | 645 | case NETDEV_GOING_DOWN: |
0d051bf9 | 646 | clear_bit_unlock(0, &b->up); |
5b7066c3 JPM |
647 | tipc_reset_bearer(net, b); |
648 | break; | |
6e967adf | 649 | case NETDEV_CHANGEMTU: |
3de81b75 MK |
650 | if (tipc_mtu_bad(dev, 0)) { |
651 | bearer_disable(net, b); | |
652 | break; | |
653 | } | |
654 | b->mtu = dev->mtu; | |
1a90632d | 655 | tipc_reset_bearer(net, b); |
a21a584d | 656 | break; |
6e967adf | 657 | case NETDEV_CHANGEADDR: |
1a90632d | 658 | b->media->raw2addr(b, &b->addr, |
5b7066c3 | 659 | (char *)dev->dev_addr); |
1a90632d | 660 | tipc_reset_bearer(net, b); |
6e967adf YX |
661 | break; |
662 | case NETDEV_UNREGISTER: | |
663 | case NETDEV_CHANGENAME: | |
1a90632d | 664 | bearer_disable(dev_net(dev), b); |
6e967adf YX |
665 | break; |
666 | } | |
6e967adf YX |
667 | return NOTIFY_OK; |
668 | } | |
669 | ||
6e967adf YX |
670 | static struct notifier_block notifier = { |
671 | .notifier_call = tipc_l2_device_event, | |
672 | .priority = 0, | |
673 | }; | |
674 | ||
675 | int tipc_bearer_setup(void) | |
676 | { | |
d55c60eb | 677 | return register_netdevice_notifier(¬ifier); |
6e967adf YX |
678 | } |
679 | ||
680 | void tipc_bearer_cleanup(void) | |
681 | { | |
682 | unregister_netdevice_notifier(¬ifier); | |
6e967adf | 683 | } |
b97bf3fd | 684 | |
f2f9800d | 685 | void tipc_bearer_stop(struct net *net) |
b97bf3fd | 686 | { |
7f9f95d9 | 687 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
1a90632d | 688 | struct tipc_bearer *b; |
b97bf3fd PL |
689 | u32 i; |
690 | ||
b97bf3fd | 691 | for (i = 0; i < MAX_BEARERS; i++) { |
1a90632d JPM |
692 | b = rtnl_dereference(tn->bearer_list[i]); |
693 | if (b) { | |
694 | bearer_disable(net, b); | |
7f9f95d9 | 695 | tn->bearer_list[i] = NULL; |
3874ccbb | 696 | } |
b97bf3fd | 697 | } |
b97bf3fd | 698 | } |
0655f6a8 | 699 | |
35b9dd76 | 700 | /* Caller should hold rtnl_lock to protect the bearer */ |
d8182804 | 701 | static int __tipc_nl_add_bearer(struct tipc_nl_msg *msg, |
f2f67390 | 702 | struct tipc_bearer *bearer, int nlflags) |
35b9dd76 RA |
703 | { |
704 | void *hdr; | |
705 | struct nlattr *attrs; | |
706 | struct nlattr *prop; | |
707 | ||
bfb3e5dd | 708 | hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family, |
f2f67390 | 709 | nlflags, TIPC_NL_BEARER_GET); |
35b9dd76 RA |
710 | if (!hdr) |
711 | return -EMSGSIZE; | |
712 | ||
713 | attrs = nla_nest_start(msg->skb, TIPC_NLA_BEARER); | |
714 | if (!attrs) | |
715 | goto msg_full; | |
716 | ||
717 | if (nla_put_string(msg->skb, TIPC_NLA_BEARER_NAME, bearer->name)) | |
718 | goto attr_msg_full; | |
719 | ||
720 | prop = nla_nest_start(msg->skb, TIPC_NLA_BEARER_PROP); | |
721 | if (!prop) | |
722 | goto prop_msg_full; | |
723 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, bearer->priority)) | |
724 | goto prop_msg_full; | |
725 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, bearer->tolerance)) | |
726 | goto prop_msg_full; | |
727 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, bearer->window)) | |
728 | goto prop_msg_full; | |
729 | ||
730 | nla_nest_end(msg->skb, prop); | |
fdb3accc RA |
731 | |
732 | #ifdef CONFIG_TIPC_MEDIA_UDP | |
733 | if (bearer->media->type_id == TIPC_MEDIA_TYPE_UDP) { | |
734 | if (tipc_udp_nl_add_bearer_data(msg, bearer)) | |
735 | goto attr_msg_full; | |
736 | } | |
737 | #endif | |
738 | ||
35b9dd76 RA |
739 | nla_nest_end(msg->skb, attrs); |
740 | genlmsg_end(msg->skb, hdr); | |
741 | ||
742 | return 0; | |
743 | ||
744 | prop_msg_full: | |
745 | nla_nest_cancel(msg->skb, prop); | |
746 | attr_msg_full: | |
747 | nla_nest_cancel(msg->skb, attrs); | |
748 | msg_full: | |
749 | genlmsg_cancel(msg->skb, hdr); | |
750 | ||
751 | return -EMSGSIZE; | |
752 | } | |
753 | ||
754 | int tipc_nl_bearer_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
755 | { | |
756 | int err; | |
757 | int i = cb->args[0]; | |
758 | struct tipc_bearer *bearer; | |
759 | struct tipc_nl_msg msg; | |
7f9f95d9 YX |
760 | struct net *net = sock_net(skb->sk); |
761 | struct tipc_net *tn = net_generic(net, tipc_net_id); | |
35b9dd76 RA |
762 | |
763 | if (i == MAX_BEARERS) | |
764 | return 0; | |
765 | ||
766 | msg.skb = skb; | |
767 | msg.portid = NETLINK_CB(cb->skb).portid; | |
768 | msg.seq = cb->nlh->nlmsg_seq; | |
769 | ||
770 | rtnl_lock(); | |
771 | for (i = 0; i < MAX_BEARERS; i++) { | |
7f9f95d9 | 772 | bearer = rtnl_dereference(tn->bearer_list[i]); |
35b9dd76 RA |
773 | if (!bearer) |
774 | continue; | |
775 | ||
f2f67390 | 776 | err = __tipc_nl_add_bearer(&msg, bearer, NLM_F_MULTI); |
35b9dd76 RA |
777 | if (err) |
778 | break; | |
779 | } | |
780 | rtnl_unlock(); | |
781 | ||
782 | cb->args[0] = i; | |
783 | return skb->len; | |
784 | } | |
785 | ||
786 | int tipc_nl_bearer_get(struct sk_buff *skb, struct genl_info *info) | |
787 | { | |
788 | int err; | |
789 | char *name; | |
790 | struct sk_buff *rep; | |
791 | struct tipc_bearer *bearer; | |
792 | struct tipc_nl_msg msg; | |
793 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
7f9f95d9 | 794 | struct net *net = genl_info_net(info); |
35b9dd76 RA |
795 | |
796 | if (!info->attrs[TIPC_NLA_BEARER]) | |
797 | return -EINVAL; | |
798 | ||
799 | err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX, | |
800 | info->attrs[TIPC_NLA_BEARER], | |
fe52145f | 801 | tipc_nl_bearer_policy, info->extack); |
35b9dd76 RA |
802 | if (err) |
803 | return err; | |
804 | ||
805 | if (!attrs[TIPC_NLA_BEARER_NAME]) | |
806 | return -EINVAL; | |
807 | name = nla_data(attrs[TIPC_NLA_BEARER_NAME]); | |
808 | ||
809 | rep = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); | |
810 | if (!rep) | |
811 | return -ENOMEM; | |
812 | ||
813 | msg.skb = rep; | |
814 | msg.portid = info->snd_portid; | |
815 | msg.seq = info->snd_seq; | |
816 | ||
817 | rtnl_lock(); | |
7f9f95d9 | 818 | bearer = tipc_bearer_find(net, name); |
35b9dd76 RA |
819 | if (!bearer) { |
820 | err = -EINVAL; | |
821 | goto err_out; | |
822 | } | |
823 | ||
f2f67390 | 824 | err = __tipc_nl_add_bearer(&msg, bearer, 0); |
35b9dd76 RA |
825 | if (err) |
826 | goto err_out; | |
827 | rtnl_unlock(); | |
828 | ||
829 | return genlmsg_reply(rep, info); | |
830 | err_out: | |
831 | rtnl_unlock(); | |
832 | nlmsg_free(rep); | |
833 | ||
834 | return err; | |
835 | } | |
836 | ||
0655f6a8 RA |
837 | int tipc_nl_bearer_disable(struct sk_buff *skb, struct genl_info *info) |
838 | { | |
839 | int err; | |
840 | char *name; | |
841 | struct tipc_bearer *bearer; | |
842 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
9ab15465 | 843 | struct net *net = sock_net(skb->sk); |
0655f6a8 RA |
844 | |
845 | if (!info->attrs[TIPC_NLA_BEARER]) | |
846 | return -EINVAL; | |
847 | ||
848 | err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX, | |
849 | info->attrs[TIPC_NLA_BEARER], | |
fe52145f | 850 | tipc_nl_bearer_policy, info->extack); |
0655f6a8 RA |
851 | if (err) |
852 | return err; | |
853 | ||
854 | if (!attrs[TIPC_NLA_BEARER_NAME]) | |
855 | return -EINVAL; | |
856 | ||
857 | name = nla_data(attrs[TIPC_NLA_BEARER_NAME]); | |
858 | ||
859 | rtnl_lock(); | |
7f9f95d9 | 860 | bearer = tipc_bearer_find(net, name); |
0655f6a8 RA |
861 | if (!bearer) { |
862 | rtnl_unlock(); | |
863 | return -EINVAL; | |
864 | } | |
865 | ||
b1c29f6b | 866 | bearer_disable(net, bearer); |
0655f6a8 RA |
867 | rtnl_unlock(); |
868 | ||
869 | return 0; | |
870 | } | |
871 | ||
872 | int tipc_nl_bearer_enable(struct sk_buff *skb, struct genl_info *info) | |
873 | { | |
874 | int err; | |
875 | char *bearer; | |
876 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
9ab15465 RA |
877 | struct net *net = sock_net(skb->sk); |
878 | struct tipc_net *tn = net_generic(net, tipc_net_id); | |
0655f6a8 RA |
879 | u32 domain; |
880 | u32 prio; | |
881 | ||
882 | prio = TIPC_MEDIA_LINK_PRI; | |
9ff26e9f | 883 | domain = tn->own_addr & TIPC_ZONE_CLUSTER_MASK; |
0655f6a8 RA |
884 | |
885 | if (!info->attrs[TIPC_NLA_BEARER]) | |
886 | return -EINVAL; | |
887 | ||
888 | err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX, | |
889 | info->attrs[TIPC_NLA_BEARER], | |
fe52145f | 890 | tipc_nl_bearer_policy, info->extack); |
0655f6a8 RA |
891 | if (err) |
892 | return err; | |
893 | ||
894 | if (!attrs[TIPC_NLA_BEARER_NAME]) | |
895 | return -EINVAL; | |
896 | ||
897 | bearer = nla_data(attrs[TIPC_NLA_BEARER_NAME]); | |
898 | ||
899 | if (attrs[TIPC_NLA_BEARER_DOMAIN]) | |
900 | domain = nla_get_u32(attrs[TIPC_NLA_BEARER_DOMAIN]); | |
901 | ||
902 | if (attrs[TIPC_NLA_BEARER_PROP]) { | |
903 | struct nlattr *props[TIPC_NLA_PROP_MAX + 1]; | |
904 | ||
905 | err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_BEARER_PROP], | |
906 | props); | |
907 | if (err) | |
908 | return err; | |
909 | ||
910 | if (props[TIPC_NLA_PROP_PRIO]) | |
911 | prio = nla_get_u32(props[TIPC_NLA_PROP_PRIO]); | |
912 | } | |
913 | ||
914 | rtnl_lock(); | |
d0f91938 | 915 | err = tipc_enable_bearer(net, bearer, domain, prio, attrs); |
0655f6a8 RA |
916 | if (err) { |
917 | rtnl_unlock(); | |
918 | return err; | |
919 | } | |
920 | rtnl_unlock(); | |
921 | ||
922 | return 0; | |
923 | } | |
315c00bc | 924 | |
ef20cd4d RA |
925 | int tipc_nl_bearer_add(struct sk_buff *skb, struct genl_info *info) |
926 | { | |
927 | int err; | |
928 | char *name; | |
929 | struct tipc_bearer *b; | |
930 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
931 | struct net *net = sock_net(skb->sk); | |
932 | ||
933 | if (!info->attrs[TIPC_NLA_BEARER]) | |
934 | return -EINVAL; | |
935 | ||
936 | err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX, | |
937 | info->attrs[TIPC_NLA_BEARER], | |
fe52145f | 938 | tipc_nl_bearer_policy, info->extack); |
ef20cd4d RA |
939 | if (err) |
940 | return err; | |
941 | ||
942 | if (!attrs[TIPC_NLA_BEARER_NAME]) | |
943 | return -EINVAL; | |
944 | name = nla_data(attrs[TIPC_NLA_BEARER_NAME]); | |
945 | ||
946 | rtnl_lock(); | |
947 | b = tipc_bearer_find(net, name); | |
948 | if (!b) { | |
949 | rtnl_unlock(); | |
950 | return -EINVAL; | |
951 | } | |
952 | ||
953 | #ifdef CONFIG_TIPC_MEDIA_UDP | |
954 | if (attrs[TIPC_NLA_BEARER_UDP_OPTS]) { | |
955 | err = tipc_udp_nl_bearer_add(b, | |
956 | attrs[TIPC_NLA_BEARER_UDP_OPTS]); | |
957 | if (err) { | |
958 | rtnl_unlock(); | |
959 | return err; | |
960 | } | |
961 | } | |
962 | #endif | |
963 | rtnl_unlock(); | |
964 | ||
965 | return 0; | |
966 | } | |
967 | ||
315c00bc RA |
968 | int tipc_nl_bearer_set(struct sk_buff *skb, struct genl_info *info) |
969 | { | |
970 | int err; | |
971 | char *name; | |
972 | struct tipc_bearer *b; | |
973 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
c3d6fb85 | 974 | struct net *net = sock_net(skb->sk); |
315c00bc RA |
975 | |
976 | if (!info->attrs[TIPC_NLA_BEARER]) | |
977 | return -EINVAL; | |
978 | ||
979 | err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX, | |
980 | info->attrs[TIPC_NLA_BEARER], | |
fe52145f | 981 | tipc_nl_bearer_policy, info->extack); |
315c00bc RA |
982 | if (err) |
983 | return err; | |
984 | ||
985 | if (!attrs[TIPC_NLA_BEARER_NAME]) | |
986 | return -EINVAL; | |
987 | name = nla_data(attrs[TIPC_NLA_BEARER_NAME]); | |
988 | ||
989 | rtnl_lock(); | |
7f9f95d9 | 990 | b = tipc_bearer_find(net, name); |
315c00bc RA |
991 | if (!b) { |
992 | rtnl_unlock(); | |
993 | return -EINVAL; | |
994 | } | |
995 | ||
996 | if (attrs[TIPC_NLA_BEARER_PROP]) { | |
997 | struct nlattr *props[TIPC_NLA_PROP_MAX + 1]; | |
998 | ||
999 | err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_BEARER_PROP], | |
1000 | props); | |
1001 | if (err) { | |
1002 | rtnl_unlock(); | |
1003 | return err; | |
1004 | } | |
1005 | ||
1006 | if (props[TIPC_NLA_PROP_TOL]) | |
1007 | b->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]); | |
1008 | if (props[TIPC_NLA_PROP_PRIO]) | |
1009 | b->priority = nla_get_u32(props[TIPC_NLA_PROP_PRIO]); | |
1010 | if (props[TIPC_NLA_PROP_WIN]) | |
1011 | b->window = nla_get_u32(props[TIPC_NLA_PROP_WIN]); | |
1012 | } | |
1013 | rtnl_unlock(); | |
1014 | ||
1015 | return 0; | |
1016 | } | |
46f15c67 | 1017 | |
d8182804 | 1018 | static int __tipc_nl_add_media(struct tipc_nl_msg *msg, |
f2f67390 | 1019 | struct tipc_media *media, int nlflags) |
46f15c67 RA |
1020 | { |
1021 | void *hdr; | |
1022 | struct nlattr *attrs; | |
1023 | struct nlattr *prop; | |
1024 | ||
bfb3e5dd | 1025 | hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family, |
f2f67390 | 1026 | nlflags, TIPC_NL_MEDIA_GET); |
46f15c67 RA |
1027 | if (!hdr) |
1028 | return -EMSGSIZE; | |
1029 | ||
1030 | attrs = nla_nest_start(msg->skb, TIPC_NLA_MEDIA); | |
1031 | if (!attrs) | |
1032 | goto msg_full; | |
1033 | ||
1034 | if (nla_put_string(msg->skb, TIPC_NLA_MEDIA_NAME, media->name)) | |
1035 | goto attr_msg_full; | |
1036 | ||
1037 | prop = nla_nest_start(msg->skb, TIPC_NLA_MEDIA_PROP); | |
1038 | if (!prop) | |
1039 | goto prop_msg_full; | |
1040 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, media->priority)) | |
1041 | goto prop_msg_full; | |
1042 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, media->tolerance)) | |
1043 | goto prop_msg_full; | |
1044 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, media->window)) | |
1045 | goto prop_msg_full; | |
1046 | ||
1047 | nla_nest_end(msg->skb, prop); | |
1048 | nla_nest_end(msg->skb, attrs); | |
1049 | genlmsg_end(msg->skb, hdr); | |
1050 | ||
1051 | return 0; | |
1052 | ||
1053 | prop_msg_full: | |
1054 | nla_nest_cancel(msg->skb, prop); | |
1055 | attr_msg_full: | |
1056 | nla_nest_cancel(msg->skb, attrs); | |
1057 | msg_full: | |
1058 | genlmsg_cancel(msg->skb, hdr); | |
1059 | ||
1060 | return -EMSGSIZE; | |
1061 | } | |
1062 | ||
1063 | int tipc_nl_media_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
1064 | { | |
1065 | int err; | |
1066 | int i = cb->args[0]; | |
1067 | struct tipc_nl_msg msg; | |
1068 | ||
1069 | if (i == MAX_MEDIA) | |
1070 | return 0; | |
1071 | ||
1072 | msg.skb = skb; | |
1073 | msg.portid = NETLINK_CB(cb->skb).portid; | |
1074 | msg.seq = cb->nlh->nlmsg_seq; | |
1075 | ||
1076 | rtnl_lock(); | |
1077 | for (; media_info_array[i] != NULL; i++) { | |
f2f67390 ND |
1078 | err = __tipc_nl_add_media(&msg, media_info_array[i], |
1079 | NLM_F_MULTI); | |
46f15c67 RA |
1080 | if (err) |
1081 | break; | |
1082 | } | |
1083 | rtnl_unlock(); | |
1084 | ||
1085 | cb->args[0] = i; | |
1086 | return skb->len; | |
1087 | } | |
1088 | ||
1089 | int tipc_nl_media_get(struct sk_buff *skb, struct genl_info *info) | |
1090 | { | |
1091 | int err; | |
1092 | char *name; | |
1093 | struct tipc_nl_msg msg; | |
1094 | struct tipc_media *media; | |
1095 | struct sk_buff *rep; | |
1096 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
1097 | ||
1098 | if (!info->attrs[TIPC_NLA_MEDIA]) | |
1099 | return -EINVAL; | |
1100 | ||
1101 | err = nla_parse_nested(attrs, TIPC_NLA_MEDIA_MAX, | |
1102 | info->attrs[TIPC_NLA_MEDIA], | |
fe52145f | 1103 | tipc_nl_media_policy, info->extack); |
46f15c67 RA |
1104 | if (err) |
1105 | return err; | |
1106 | ||
1107 | if (!attrs[TIPC_NLA_MEDIA_NAME]) | |
1108 | return -EINVAL; | |
1109 | name = nla_data(attrs[TIPC_NLA_MEDIA_NAME]); | |
1110 | ||
1111 | rep = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); | |
1112 | if (!rep) | |
1113 | return -ENOMEM; | |
1114 | ||
1115 | msg.skb = rep; | |
1116 | msg.portid = info->snd_portid; | |
1117 | msg.seq = info->snd_seq; | |
1118 | ||
1119 | rtnl_lock(); | |
1120 | media = tipc_media_find(name); | |
1121 | if (!media) { | |
1122 | err = -EINVAL; | |
1123 | goto err_out; | |
1124 | } | |
1125 | ||
f2f67390 | 1126 | err = __tipc_nl_add_media(&msg, media, 0); |
46f15c67 RA |
1127 | if (err) |
1128 | goto err_out; | |
1129 | rtnl_unlock(); | |
1130 | ||
1131 | return genlmsg_reply(rep, info); | |
1132 | err_out: | |
1133 | rtnl_unlock(); | |
1134 | nlmsg_free(rep); | |
1135 | ||
1136 | return err; | |
1137 | } | |
1e55417d RA |
1138 | |
1139 | int tipc_nl_media_set(struct sk_buff *skb, struct genl_info *info) | |
1140 | { | |
1141 | int err; | |
1142 | char *name; | |
1143 | struct tipc_media *m; | |
1144 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
1145 | ||
1146 | if (!info->attrs[TIPC_NLA_MEDIA]) | |
1147 | return -EINVAL; | |
1148 | ||
1149 | err = nla_parse_nested(attrs, TIPC_NLA_MEDIA_MAX, | |
1150 | info->attrs[TIPC_NLA_MEDIA], | |
fe52145f | 1151 | tipc_nl_media_policy, info->extack); |
1e55417d RA |
1152 | |
1153 | if (!attrs[TIPC_NLA_MEDIA_NAME]) | |
1154 | return -EINVAL; | |
1155 | name = nla_data(attrs[TIPC_NLA_MEDIA_NAME]); | |
1156 | ||
1157 | rtnl_lock(); | |
1158 | m = tipc_media_find(name); | |
1159 | if (!m) { | |
1160 | rtnl_unlock(); | |
1161 | return -EINVAL; | |
1162 | } | |
1163 | ||
1164 | if (attrs[TIPC_NLA_MEDIA_PROP]) { | |
1165 | struct nlattr *props[TIPC_NLA_PROP_MAX + 1]; | |
1166 | ||
1167 | err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_MEDIA_PROP], | |
1168 | props); | |
1169 | if (err) { | |
1170 | rtnl_unlock(); | |
1171 | return err; | |
1172 | } | |
1173 | ||
1174 | if (props[TIPC_NLA_PROP_TOL]) | |
1175 | m->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]); | |
1176 | if (props[TIPC_NLA_PROP_PRIO]) | |
1177 | m->priority = nla_get_u32(props[TIPC_NLA_PROP_PRIO]); | |
1178 | if (props[TIPC_NLA_PROP_WIN]) | |
1179 | m->window = nla_get_u32(props[TIPC_NLA_PROP_WIN]); | |
1180 | } | |
1181 | rtnl_unlock(); | |
1182 | ||
1183 | return 0; | |
1184 | } |