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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); |
3a777ff8 | 68 | |
b97bf3fd | 69 | /** |
5c216e1d | 70 | * tipc_media_find - locates specified media object by name |
b97bf3fd | 71 | */ |
358a0d1c | 72 | struct tipc_media *tipc_media_find(const char *name) |
b97bf3fd | 73 | { |
b97bf3fd PL |
74 | u32 i; |
75 | ||
ef72a7e0 JPM |
76 | for (i = 0; media_info_array[i] != NULL; i++) { |
77 | if (!strcmp(media_info_array[i]->name, name)) | |
5702dbab | 78 | break; |
b97bf3fd | 79 | } |
ef72a7e0 | 80 | return media_info_array[i]; |
b97bf3fd PL |
81 | } |
82 | ||
c79be454 AS |
83 | /** |
84 | * media_find_id - locates specified media object by type identifier | |
85 | */ | |
358a0d1c | 86 | static struct tipc_media *media_find_id(u8 type) |
c79be454 AS |
87 | { |
88 | u32 i; | |
89 | ||
ef72a7e0 JPM |
90 | for (i = 0; media_info_array[i] != NULL; i++) { |
91 | if (media_info_array[i]->type_id == type) | |
5702dbab | 92 | break; |
c79be454 | 93 | } |
ef72a7e0 | 94 | return media_info_array[i]; |
b97bf3fd PL |
95 | } |
96 | ||
97 | /** | |
4323add6 | 98 | * tipc_media_addr_printf - record media address in print buffer |
b97bf3fd | 99 | */ |
dc1aed37 | 100 | void tipc_media_addr_printf(char *buf, int len, struct tipc_media_addr *a) |
b97bf3fd | 101 | { |
c61b666e | 102 | char addr_str[MAX_ADDR_STR]; |
1a90632d | 103 | struct tipc_media *m; |
dc1aed37 | 104 | int ret; |
b97bf3fd | 105 | |
1a90632d | 106 | m = media_find_id(a->media_id); |
b97bf3fd | 107 | |
1a90632d JPM |
108 | if (m && !m->addr2str(a, addr_str, sizeof(addr_str))) |
109 | ret = scnprintf(buf, len, "%s(%s)", m->name, addr_str); | |
c61b666e | 110 | else { |
c61b666e | 111 | u32 i; |
b97bf3fd | 112 | |
941787b8 | 113 | ret = scnprintf(buf, len, "UNKNOWN(%u)", a->media_id); |
3d749a6a | 114 | for (i = 0; i < sizeof(a->value); i++) |
941787b8 | 115 | ret += scnprintf(buf - ret, len + ret, |
dc1aed37 | 116 | "-%02x", a->value[i]); |
b97bf3fd PL |
117 | } |
118 | } | |
119 | ||
b97bf3fd PL |
120 | /** |
121 | * bearer_name_validate - validate & (optionally) deconstruct bearer name | |
2c53040f BH |
122 | * @name: ptr to bearer name string |
123 | * @name_parts: ptr to area for bearer name components (or NULL if not needed) | |
c4307285 | 124 | * |
b97bf3fd PL |
125 | * Returns 1 if bearer name is valid, otherwise 0. |
126 | */ | |
c4307285 | 127 | static int bearer_name_validate(const char *name, |
f19765f4 | 128 | struct tipc_bearer_names *name_parts) |
b97bf3fd PL |
129 | { |
130 | char name_copy[TIPC_MAX_BEARER_NAME]; | |
131 | char *media_name; | |
132 | char *if_name; | |
133 | u32 media_len; | |
134 | u32 if_len; | |
135 | ||
136 | /* copy bearer name & ensure length is OK */ | |
b97bf3fd PL |
137 | name_copy[TIPC_MAX_BEARER_NAME - 1] = 0; |
138 | /* need above in case non-Posix strncpy() doesn't pad with nulls */ | |
139 | strncpy(name_copy, name, TIPC_MAX_BEARER_NAME); | |
140 | if (name_copy[TIPC_MAX_BEARER_NAME - 1] != 0) | |
141 | return 0; | |
142 | ||
143 | /* ensure all component parts of bearer name are present */ | |
b97bf3fd | 144 | media_name = name_copy; |
2db9983a AS |
145 | if_name = strchr(media_name, ':'); |
146 | if (if_name == NULL) | |
b97bf3fd PL |
147 | return 0; |
148 | *(if_name++) = 0; | |
149 | media_len = if_name - media_name; | |
150 | if_len = strlen(if_name) + 1; | |
151 | ||
152 | /* validate component parts of bearer name */ | |
c4307285 | 153 | if ((media_len <= 1) || (media_len > TIPC_MAX_MEDIA_NAME) || |
fc073938 | 154 | (if_len <= 1) || (if_len > TIPC_MAX_IF_NAME)) |
b97bf3fd PL |
155 | return 0; |
156 | ||
157 | /* return bearer name components, if necessary */ | |
b97bf3fd PL |
158 | if (name_parts) { |
159 | strcpy(name_parts->media_name, media_name); | |
160 | strcpy(name_parts->if_name, if_name); | |
161 | } | |
162 | return 1; | |
163 | } | |
164 | ||
165 | /** | |
5c216e1d | 166 | * tipc_bearer_find - locates bearer object with matching bearer name |
b97bf3fd | 167 | */ |
7f9f95d9 | 168 | struct tipc_bearer *tipc_bearer_find(struct net *net, const char *name) |
b97bf3fd | 169 | { |
7f9f95d9 | 170 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
1a90632d | 171 | struct tipc_bearer *b; |
b97bf3fd PL |
172 | u32 i; |
173 | ||
3874ccbb | 174 | for (i = 0; i < MAX_BEARERS; i++) { |
1a90632d JPM |
175 | b = rtnl_dereference(tn->bearer_list[i]); |
176 | if (b && (!strcmp(b->name, name))) | |
177 | return b; | |
b97bf3fd | 178 | } |
1fc54d8f | 179 | return NULL; |
b97bf3fd PL |
180 | } |
181 | ||
ff0d3e78 PB |
182 | /* tipc_bearer_get_name - get the bearer name from its id. |
183 | * @net: network namespace | |
184 | * @name: a pointer to the buffer where the name will be stored. | |
185 | * @bearer_id: the id to get the name from. | |
186 | */ | |
187 | int tipc_bearer_get_name(struct net *net, char *name, u32 bearer_id) | |
188 | { | |
189 | struct tipc_net *tn = tipc_net(net); | |
190 | struct tipc_bearer *b; | |
191 | ||
192 | if (bearer_id >= MAX_BEARERS) | |
193 | return -EINVAL; | |
194 | ||
195 | b = rtnl_dereference(tn->bearer_list[bearer_id]); | |
196 | if (!b) | |
197 | return -EINVAL; | |
198 | ||
199 | strcpy(name, b->name); | |
200 | return 0; | |
201 | } | |
202 | ||
7f9f95d9 | 203 | void tipc_bearer_add_dest(struct net *net, u32 bearer_id, u32 dest) |
b97bf3fd | 204 | { |
7f9f95d9 | 205 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
1a90632d | 206 | struct tipc_bearer *b; |
7a2f7d18 YX |
207 | |
208 | rcu_read_lock(); | |
1a90632d JPM |
209 | b = rcu_dereference_rtnl(tn->bearer_list[bearer_id]); |
210 | if (b) | |
211 | tipc_disc_add_dest(b->link_req); | |
7a2f7d18 | 212 | rcu_read_unlock(); |
b97bf3fd PL |
213 | } |
214 | ||
7f9f95d9 | 215 | void tipc_bearer_remove_dest(struct net *net, u32 bearer_id, u32 dest) |
b97bf3fd | 216 | { |
7f9f95d9 | 217 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
1a90632d | 218 | struct tipc_bearer *b; |
7a2f7d18 YX |
219 | |
220 | rcu_read_lock(); | |
1a90632d JPM |
221 | b = rcu_dereference_rtnl(tn->bearer_list[bearer_id]); |
222 | if (b) | |
223 | tipc_disc_remove_dest(b->link_req); | |
7a2f7d18 | 224 | rcu_read_unlock(); |
b97bf3fd PL |
225 | } |
226 | ||
b97bf3fd PL |
227 | /** |
228 | * tipc_enable_bearer - enable bearer with the given name | |
c4307285 | 229 | */ |
9ab15465 | 230 | static int tipc_enable_bearer(struct net *net, const char *name, |
d0f91938 EH |
231 | u32 disc_domain, u32 priority, |
232 | struct nlattr *attr[]) | |
b97bf3fd | 233 | { |
7f9f95d9 | 234 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
1a90632d JPM |
235 | struct tipc_bearer *b; |
236 | struct tipc_media *m; | |
f19765f4 | 237 | struct tipc_bearer_names b_names; |
4e801fa1 | 238 | struct sk_buff *skb; |
b97bf3fd PL |
239 | char addr_string[16]; |
240 | u32 bearer_id; | |
241 | u32 with_this_prio; | |
242 | u32 i; | |
243 | int res = -EINVAL; | |
244 | ||
34747539 | 245 | if (!tn->own_addr) { |
2cf8aa19 EH |
246 | pr_warn("Bearer <%s> rejected, not supported in standalone mode\n", |
247 | name); | |
b97bf3fd | 248 | return -ENOPROTOOPT; |
a10bd924 | 249 | } |
f19765f4 | 250 | if (!bearer_name_validate(name, &b_names)) { |
2cf8aa19 | 251 | pr_warn("Bearer <%s> rejected, illegal name\n", name); |
16cb4b33 | 252 | return -EINVAL; |
a10bd924 | 253 | } |
66e019a6 | 254 | if (tipc_addr_domain_valid(disc_domain) && |
34747539 YX |
255 | (disc_domain != tn->own_addr)) { |
256 | if (tipc_in_scope(disc_domain, tn->own_addr)) { | |
9ff26e9f | 257 | disc_domain = tn->own_addr & TIPC_ZONE_CLUSTER_MASK; |
66e019a6 | 258 | res = 0; /* accept any node in own cluster */ |
34747539 | 259 | } else if (in_own_cluster_exact(net, disc_domain)) |
66e019a6 AS |
260 | res = 0; /* accept specified node in own cluster */ |
261 | } | |
262 | if (res) { | |
2cf8aa19 EH |
263 | pr_warn("Bearer <%s> rejected, illegal discovery domain\n", |
264 | name); | |
a10bd924 AS |
265 | return -EINVAL; |
266 | } | |
9efde4a0 | 267 | if ((priority > TIPC_MAX_LINK_PRI) && |
a10bd924 | 268 | (priority != TIPC_MEDIA_LINK_PRI)) { |
2cf8aa19 | 269 | pr_warn("Bearer <%s> rejected, illegal priority\n", name); |
b97bf3fd | 270 | return -EINVAL; |
a10bd924 | 271 | } |
b97bf3fd | 272 | |
1a90632d JPM |
273 | m = tipc_media_find(b_names.media_name); |
274 | if (!m) { | |
2cf8aa19 EH |
275 | pr_warn("Bearer <%s> rejected, media <%s> not registered\n", |
276 | name, b_names.media_name); | |
7216cd94 | 277 | return -EINVAL; |
b97bf3fd | 278 | } |
16cb4b33 PL |
279 | |
280 | if (priority == TIPC_MEDIA_LINK_PRI) | |
1a90632d | 281 | priority = m->priority; |
b97bf3fd PL |
282 | |
283 | restart: | |
284 | bearer_id = MAX_BEARERS; | |
285 | with_this_prio = 1; | |
286 | for (i = MAX_BEARERS; i-- != 0; ) { | |
1a90632d JPM |
287 | b = rtnl_dereference(tn->bearer_list[i]); |
288 | if (!b) { | |
b97bf3fd PL |
289 | bearer_id = i; |
290 | continue; | |
291 | } | |
1a90632d | 292 | if (!strcmp(name, b->name)) { |
2cf8aa19 EH |
293 | pr_warn("Bearer <%s> rejected, already enabled\n", |
294 | name); | |
7216cd94 | 295 | return -EINVAL; |
b97bf3fd | 296 | } |
1a90632d | 297 | if ((b->priority == priority) && |
b97bf3fd PL |
298 | (++with_this_prio > 2)) { |
299 | if (priority-- == 0) { | |
2cf8aa19 EH |
300 | pr_warn("Bearer <%s> rejected, duplicate priority\n", |
301 | name); | |
7216cd94 | 302 | return -EINVAL; |
b97bf3fd | 303 | } |
2cf8aa19 EH |
304 | pr_warn("Bearer <%s> priority adjustment required %u->%u\n", |
305 | name, priority + 1, priority); | |
b97bf3fd PL |
306 | goto restart; |
307 | } | |
308 | } | |
309 | if (bearer_id >= MAX_BEARERS) { | |
2cf8aa19 EH |
310 | pr_warn("Bearer <%s> rejected, bearer limit reached (%u)\n", |
311 | name, MAX_BEARERS); | |
7216cd94 | 312 | return -EINVAL; |
b97bf3fd PL |
313 | } |
314 | ||
1a90632d JPM |
315 | b = kzalloc(sizeof(*b), GFP_ATOMIC); |
316 | if (!b) | |
7216cd94 YX |
317 | return -ENOMEM; |
318 | ||
1a90632d JPM |
319 | strcpy(b->name, name); |
320 | b->media = m; | |
321 | res = m->enable_media(net, b, attr); | |
b97bf3fd | 322 | if (res) { |
2cf8aa19 EH |
323 | pr_warn("Bearer <%s> rejected, enable failure (%d)\n", |
324 | name, -res); | |
7216cd94 | 325 | return -EINVAL; |
b97bf3fd PL |
326 | } |
327 | ||
1a90632d JPM |
328 | b->identity = bearer_id; |
329 | b->tolerance = m->tolerance; | |
330 | b->window = m->window; | |
331 | b->domain = disc_domain; | |
332 | b->net_plane = bearer_id + 'A'; | |
333 | b->priority = priority; | |
0d051bf9 | 334 | test_and_set_bit_lock(0, &b->up); |
3a777ff8 | 335 | |
4e801fa1 | 336 | res = tipc_disc_create(net, b, &b->bcast_addr, &skb); |
3a777ff8 | 337 | if (res) { |
1a90632d | 338 | bearer_disable(net, b); |
2cf8aa19 EH |
339 | pr_warn("Bearer <%s> rejected, discovery object creation failed\n", |
340 | name); | |
7216cd94 | 341 | return -EINVAL; |
3a777ff8 | 342 | } |
3874ccbb | 343 | |
1a90632d | 344 | rcu_assign_pointer(tn->bearer_list[bearer_id], b); |
4e801fa1 JPM |
345 | if (skb) |
346 | tipc_bearer_xmit_skb(net, bearer_id, skb, &b->bcast_addr); | |
35c55c98 JPM |
347 | |
348 | if (tipc_mon_create(net, bearer_id)) | |
349 | return -ENOMEM; | |
350 | ||
2cf8aa19 EH |
351 | pr_info("Enabled bearer <%s>, discovery domain %s, priority %u\n", |
352 | name, | |
353 | tipc_addr_string_fill(addr_string, disc_domain), priority); | |
b97bf3fd PL |
354 | return res; |
355 | } | |
356 | ||
357 | /** | |
512137ee | 358 | * tipc_reset_bearer - Reset all links established over this bearer |
b97bf3fd | 359 | */ |
1a90632d | 360 | static int tipc_reset_bearer(struct net *net, struct tipc_bearer *b) |
b97bf3fd | 361 | { |
1a90632d JPM |
362 | pr_info("Resetting bearer <%s>\n", b->name); |
363 | tipc_node_delete_links(net, b->identity); | |
364 | tipc_disc_reset(net, b); | |
0e35fd5e | 365 | return 0; |
b97bf3fd PL |
366 | } |
367 | ||
1fc07f3e JPM |
368 | /* tipc_bearer_reset_all - reset all links on all bearers |
369 | */ | |
370 | void tipc_bearer_reset_all(struct net *net) | |
371 | { | |
1fc07f3e JPM |
372 | struct tipc_bearer *b; |
373 | int i; | |
374 | ||
375 | for (i = 0; i < MAX_BEARERS; i++) { | |
0d051bf9 JPM |
376 | b = bearer_get(net, i); |
377 | if (b) | |
378 | clear_bit_unlock(0, &b->up); | |
379 | } | |
380 | for (i = 0; i < MAX_BEARERS; i++) { | |
381 | b = bearer_get(net, i); | |
1fc07f3e JPM |
382 | if (b) |
383 | tipc_reset_bearer(net, b); | |
384 | } | |
0d051bf9 JPM |
385 | for (i = 0; i < MAX_BEARERS; i++) { |
386 | b = bearer_get(net, i); | |
387 | if (b) | |
388 | test_and_set_bit_lock(0, &b->up); | |
389 | } | |
1fc07f3e JPM |
390 | } |
391 | ||
b97bf3fd | 392 | /** |
617d3c7a | 393 | * bearer_disable |
c4307285 | 394 | * |
7216cd94 | 395 | * Note: This routine assumes caller holds RTNL lock. |
b97bf3fd | 396 | */ |
1a90632d | 397 | static void bearer_disable(struct net *net, struct tipc_bearer *b) |
b97bf3fd | 398 | { |
5b7066c3 JPM |
399 | struct tipc_net *tn = tipc_net(net); |
400 | int bearer_id = b->identity; | |
3874ccbb | 401 | |
1a90632d | 402 | pr_info("Disabling bearer <%s>\n", b->name); |
0d051bf9 | 403 | clear_bit_unlock(0, &b->up); |
5b7066c3 | 404 | tipc_node_delete_links(net, bearer_id); |
0d051bf9 | 405 | b->media->disable_media(b); |
1a90632d JPM |
406 | RCU_INIT_POINTER(b->media_ptr, NULL); |
407 | if (b->link_req) | |
408 | tipc_disc_delete(b->link_req); | |
5b7066c3 | 409 | RCU_INIT_POINTER(tn->bearer_list[bearer_id], NULL); |
1a90632d | 410 | kfree_rcu(b, rcu); |
35c55c98 | 411 | tipc_mon_delete(net, bearer_id); |
b97bf3fd PL |
412 | } |
413 | ||
d0f91938 EH |
414 | int tipc_enable_l2_media(struct net *net, struct tipc_bearer *b, |
415 | struct nlattr *attr[]) | |
e4d050cb YX |
416 | { |
417 | struct net_device *dev; | |
418 | char *driver_name = strchr((const char *)b->name, ':') + 1; | |
419 | ||
420 | /* Find device with specified name */ | |
7f9f95d9 | 421 | dev = dev_get_by_name(net, driver_name); |
e4d050cb YX |
422 | if (!dev) |
423 | return -ENODEV; | |
3de81b75 MK |
424 | if (tipc_mtu_bad(dev, 0)) { |
425 | dev_put(dev); | |
426 | return -EINVAL; | |
427 | } | |
e4d050cb | 428 | |
38504c28 | 429 | /* Associate TIPC bearer with L2 bearer */ |
2231c5af | 430 | rcu_assign_pointer(b->media_ptr, dev); |
38504c28 | 431 | memset(&b->bcast_addr, 0, sizeof(b->bcast_addr)); |
e4d050cb YX |
432 | memcpy(b->bcast_addr.value, dev->broadcast, b->media->hwaddr_len); |
433 | b->bcast_addr.media_id = b->media->type_id; | |
434 | b->bcast_addr.broadcast = 1; | |
435 | b->mtu = dev->mtu; | |
38504c28 | 436 | b->media->raw2addr(b, &b->addr, (char *)dev->dev_addr); |
e4d050cb YX |
437 | rcu_assign_pointer(dev->tipc_ptr, b); |
438 | return 0; | |
439 | } | |
440 | ||
38504c28 | 441 | /* tipc_disable_l2_media - detach TIPC bearer from an L2 interface |
e4d050cb | 442 | * |
282b3a05 | 443 | * Mark L2 bearer as inactive so that incoming buffers are thrown away |
e4d050cb YX |
444 | */ |
445 | void tipc_disable_l2_media(struct tipc_bearer *b) | |
446 | { | |
2231c5af YX |
447 | struct net_device *dev; |
448 | ||
449 | dev = (struct net_device *)rtnl_dereference(b->media_ptr); | |
e4d050cb | 450 | RCU_INIT_POINTER(dev->tipc_ptr, NULL); |
f1c8d8cb | 451 | synchronize_net(); |
e4d050cb YX |
452 | dev_put(dev); |
453 | } | |
454 | ||
455 | /** | |
38504c28 | 456 | * tipc_l2_send_msg - send a TIPC packet out over an L2 interface |
5b7066c3 | 457 | * @skb: the packet to be sent |
1a90632d | 458 | * @b: the bearer through which the packet is to be sent |
e4d050cb YX |
459 | * @dest: peer destination address |
460 | */ | |
7214bcf8 | 461 | int tipc_l2_send_msg(struct net *net, struct sk_buff *skb, |
1da46568 | 462 | struct tipc_bearer *b, struct tipc_media_addr *dest) |
e4d050cb | 463 | { |
2231c5af | 464 | struct net_device *dev; |
e4d050cb | 465 | int delta; |
2231c5af YX |
466 | |
467 | dev = (struct net_device *)rcu_dereference_rtnl(b->media_ptr); | |
468 | if (!dev) | |
469 | return 0; | |
e4d050cb | 470 | |
0d051bf9 JPM |
471 | delta = SKB_DATA_ALIGN(dev->hard_header_len - skb_headroom(skb)); |
472 | if ((delta > 0) && pskb_expand_head(skb, delta, 0, GFP_ATOMIC)) { | |
473 | kfree_skb(skb); | |
474 | return 0; | |
475 | } | |
7214bcf8 JPM |
476 | skb_reset_network_header(skb); |
477 | skb->dev = dev; | |
478 | skb->protocol = htons(ETH_P_TIPC); | |
479 | dev_hard_header(skb, dev, ETH_P_TIPC, dest->value, | |
480 | dev->dev_addr, skb->len); | |
481 | dev_queue_xmit(skb); | |
e4d050cb YX |
482 | return 0; |
483 | } | |
484 | ||
959e1781 JPM |
485 | int tipc_bearer_mtu(struct net *net, u32 bearer_id) |
486 | { | |
487 | int mtu = 0; | |
488 | struct tipc_bearer *b; | |
489 | ||
490 | rcu_read_lock(); | |
491 | b = rcu_dereference_rtnl(tipc_net(net)->bearer_list[bearer_id]); | |
492 | if (b) | |
493 | mtu = b->mtu; | |
494 | rcu_read_unlock(); | |
495 | return mtu; | |
496 | } | |
497 | ||
60852d67 JPM |
498 | /* tipc_bearer_xmit_skb - sends buffer to destination over bearer |
499 | */ | |
500 | void tipc_bearer_xmit_skb(struct net *net, u32 bearer_id, | |
501 | struct sk_buff *skb, | |
502 | struct tipc_media_addr *dest) | |
503 | { | |
0d051bf9 | 504 | struct tipc_msg *hdr = buf_msg(skb); |
60852d67 JPM |
505 | struct tipc_bearer *b; |
506 | ||
507 | rcu_read_lock(); | |
0d051bf9 JPM |
508 | b = bearer_get(net, bearer_id); |
509 | if (likely(b && (test_bit(0, &b->up) || msg_is_reset(hdr)))) | |
60852d67 | 510 | b->media->send_msg(net, skb, b, dest); |
4e801fa1 JPM |
511 | else |
512 | kfree_skb(skb); | |
60852d67 | 513 | rcu_read_unlock(); |
60852d67 JPM |
514 | } |
515 | ||
af9b028e JPM |
516 | /* tipc_bearer_xmit() -send buffer to destination over bearer |
517 | */ | |
518 | void tipc_bearer_xmit(struct net *net, u32 bearer_id, | |
519 | struct sk_buff_head *xmitq, | |
520 | struct tipc_media_addr *dst) | |
521 | { | |
af9b028e JPM |
522 | struct tipc_bearer *b; |
523 | struct sk_buff *skb, *tmp; | |
524 | ||
525 | if (skb_queue_empty(xmitq)) | |
526 | return; | |
527 | ||
528 | rcu_read_lock(); | |
0d051bf9 | 529 | b = bearer_get(net, bearer_id); |
4e801fa1 JPM |
530 | if (unlikely(!b)) |
531 | __skb_queue_purge(xmitq); | |
532 | skb_queue_walk_safe(xmitq, skb, tmp) { | |
533 | __skb_dequeue(xmitq); | |
0d051bf9 JPM |
534 | if (likely(test_bit(0, &b->up) || msg_is_reset(buf_msg(skb)))) |
535 | b->media->send_msg(net, skb, b, dst); | |
536 | else | |
5128b185 | 537 | kfree_skb(skb); |
b06b281e JPM |
538 | } |
539 | rcu_read_unlock(); | |
540 | } | |
541 | ||
542 | /* tipc_bearer_bc_xmit() - broadcast buffers to all destinations | |
543 | */ | |
544 | void tipc_bearer_bc_xmit(struct net *net, u32 bearer_id, | |
545 | struct sk_buff_head *xmitq) | |
546 | { | |
547 | struct tipc_net *tn = tipc_net(net); | |
548 | int net_id = tn->net_id; | |
549 | struct tipc_bearer *b; | |
550 | struct sk_buff *skb, *tmp; | |
551 | struct tipc_msg *hdr; | |
552 | ||
553 | rcu_read_lock(); | |
0d051bf9 JPM |
554 | b = bearer_get(net, bearer_id); |
555 | if (unlikely(!b || !test_bit(0, &b->up))) | |
4e801fa1 JPM |
556 | __skb_queue_purge(xmitq); |
557 | skb_queue_walk_safe(xmitq, skb, tmp) { | |
558 | hdr = buf_msg(skb); | |
559 | msg_set_non_seq(hdr, 1); | |
560 | msg_set_mc_netid(hdr, net_id); | |
561 | __skb_dequeue(xmitq); | |
562 | b->media->send_msg(net, skb, b, &b->bcast_addr); | |
af9b028e JPM |
563 | } |
564 | rcu_read_unlock(); | |
565 | } | |
566 | ||
6e967adf YX |
567 | /** |
568 | * tipc_l2_rcv_msg - handle incoming TIPC message from an interface | |
569 | * @buf: the received packet | |
570 | * @dev: the net device that the packet was received on | |
571 | * @pt: the packet_type structure which was used to register this handler | |
572 | * @orig_dev: the original receive net device in case the device is a bond | |
573 | * | |
574 | * Accept only packets explicitly sent to this node, or broadcast packets; | |
575 | * ignores packets sent using interface multicast, and traffic sent to other | |
576 | * nodes (which can happen if interface is running in promiscuous mode). | |
577 | */ | |
4e801fa1 | 578 | static int tipc_l2_rcv_msg(struct sk_buff *skb, struct net_device *dev, |
6e967adf YX |
579 | struct packet_type *pt, struct net_device *orig_dev) |
580 | { | |
1a90632d | 581 | struct tipc_bearer *b; |
6e967adf | 582 | |
6e967adf | 583 | rcu_read_lock(); |
1a90632d | 584 | b = rcu_dereference_rtnl(dev->tipc_ptr); |
0d051bf9 JPM |
585 | if (likely(b && test_bit(0, &b->up) && |
586 | (skb->pkt_type <= PACKET_BROADCAST))) { | |
4e801fa1 JPM |
587 | skb->next = NULL; |
588 | tipc_rcv(dev_net(dev), skb, b); | |
589 | rcu_read_unlock(); | |
590 | return NET_RX_SUCCESS; | |
6e967adf YX |
591 | } |
592 | rcu_read_unlock(); | |
4e801fa1 | 593 | kfree_skb(skb); |
6e967adf YX |
594 | return NET_RX_DROP; |
595 | } | |
596 | ||
597 | /** | |
598 | * tipc_l2_device_event - handle device events from network device | |
599 | * @nb: the context of the notification | |
600 | * @evt: the type of event | |
601 | * @ptr: the net device that the event was on | |
602 | * | |
603 | * This function is called by the Ethernet driver in case of link | |
604 | * change event. | |
605 | */ | |
606 | static int tipc_l2_device_event(struct notifier_block *nb, unsigned long evt, | |
607 | void *ptr) | |
608 | { | |
6e967adf | 609 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
c93d3baa | 610 | struct net *net = dev_net(dev); |
1a90632d | 611 | struct tipc_bearer *b; |
6e967adf | 612 | |
1a90632d JPM |
613 | b = rtnl_dereference(dev->tipc_ptr); |
614 | if (!b) | |
6e967adf | 615 | return NOTIFY_DONE; |
6e967adf | 616 | |
6e967adf YX |
617 | switch (evt) { |
618 | case NETDEV_CHANGE: | |
619 | if (netif_carrier_ok(dev)) | |
620 | break; | |
5b7066c3 | 621 | case NETDEV_UP: |
0d051bf9 | 622 | test_and_set_bit_lock(0, &b->up); |
5b7066c3 | 623 | break; |
282b3a05 | 624 | case NETDEV_GOING_DOWN: |
0d051bf9 | 625 | clear_bit_unlock(0, &b->up); |
5b7066c3 JPM |
626 | tipc_reset_bearer(net, b); |
627 | break; | |
6e967adf | 628 | case NETDEV_CHANGEMTU: |
3de81b75 MK |
629 | if (tipc_mtu_bad(dev, 0)) { |
630 | bearer_disable(net, b); | |
631 | break; | |
632 | } | |
633 | b->mtu = dev->mtu; | |
1a90632d | 634 | tipc_reset_bearer(net, b); |
a21a584d | 635 | break; |
6e967adf | 636 | case NETDEV_CHANGEADDR: |
1a90632d | 637 | b->media->raw2addr(b, &b->addr, |
5b7066c3 | 638 | (char *)dev->dev_addr); |
1a90632d | 639 | tipc_reset_bearer(net, b); |
6e967adf YX |
640 | break; |
641 | case NETDEV_UNREGISTER: | |
642 | case NETDEV_CHANGENAME: | |
1a90632d | 643 | bearer_disable(dev_net(dev), b); |
6e967adf YX |
644 | break; |
645 | } | |
6e967adf YX |
646 | return NOTIFY_OK; |
647 | } | |
648 | ||
649 | static struct packet_type tipc_packet_type __read_mostly = { | |
184593c7 | 650 | .type = htons(ETH_P_TIPC), |
6e967adf YX |
651 | .func = tipc_l2_rcv_msg, |
652 | }; | |
653 | ||
654 | static struct notifier_block notifier = { | |
655 | .notifier_call = tipc_l2_device_event, | |
656 | .priority = 0, | |
657 | }; | |
658 | ||
659 | int tipc_bearer_setup(void) | |
660 | { | |
970122fd YX |
661 | int err; |
662 | ||
663 | err = register_netdevice_notifier(¬ifier); | |
664 | if (err) | |
665 | return err; | |
6e967adf | 666 | dev_add_pack(&tipc_packet_type); |
970122fd | 667 | return 0; |
6e967adf YX |
668 | } |
669 | ||
670 | void tipc_bearer_cleanup(void) | |
671 | { | |
672 | unregister_netdevice_notifier(¬ifier); | |
673 | dev_remove_pack(&tipc_packet_type); | |
674 | } | |
b97bf3fd | 675 | |
f2f9800d | 676 | void tipc_bearer_stop(struct net *net) |
b97bf3fd | 677 | { |
7f9f95d9 | 678 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
1a90632d | 679 | struct tipc_bearer *b; |
b97bf3fd PL |
680 | u32 i; |
681 | ||
b97bf3fd | 682 | for (i = 0; i < MAX_BEARERS; i++) { |
1a90632d JPM |
683 | b = rtnl_dereference(tn->bearer_list[i]); |
684 | if (b) { | |
685 | bearer_disable(net, b); | |
7f9f95d9 | 686 | tn->bearer_list[i] = NULL; |
3874ccbb | 687 | } |
b97bf3fd | 688 | } |
b97bf3fd | 689 | } |
0655f6a8 | 690 | |
35b9dd76 | 691 | /* Caller should hold rtnl_lock to protect the bearer */ |
d8182804 | 692 | static int __tipc_nl_add_bearer(struct tipc_nl_msg *msg, |
f2f67390 | 693 | struct tipc_bearer *bearer, int nlflags) |
35b9dd76 RA |
694 | { |
695 | void *hdr; | |
696 | struct nlattr *attrs; | |
697 | struct nlattr *prop; | |
698 | ||
bfb3e5dd | 699 | hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family, |
f2f67390 | 700 | nlflags, TIPC_NL_BEARER_GET); |
35b9dd76 RA |
701 | if (!hdr) |
702 | return -EMSGSIZE; | |
703 | ||
704 | attrs = nla_nest_start(msg->skb, TIPC_NLA_BEARER); | |
705 | if (!attrs) | |
706 | goto msg_full; | |
707 | ||
708 | if (nla_put_string(msg->skb, TIPC_NLA_BEARER_NAME, bearer->name)) | |
709 | goto attr_msg_full; | |
710 | ||
711 | prop = nla_nest_start(msg->skb, TIPC_NLA_BEARER_PROP); | |
712 | if (!prop) | |
713 | goto prop_msg_full; | |
714 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, bearer->priority)) | |
715 | goto prop_msg_full; | |
716 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, bearer->tolerance)) | |
717 | goto prop_msg_full; | |
718 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, bearer->window)) | |
719 | goto prop_msg_full; | |
720 | ||
721 | nla_nest_end(msg->skb, prop); | |
fdb3accc RA |
722 | |
723 | #ifdef CONFIG_TIPC_MEDIA_UDP | |
724 | if (bearer->media->type_id == TIPC_MEDIA_TYPE_UDP) { | |
725 | if (tipc_udp_nl_add_bearer_data(msg, bearer)) | |
726 | goto attr_msg_full; | |
727 | } | |
728 | #endif | |
729 | ||
35b9dd76 RA |
730 | nla_nest_end(msg->skb, attrs); |
731 | genlmsg_end(msg->skb, hdr); | |
732 | ||
733 | return 0; | |
734 | ||
735 | prop_msg_full: | |
736 | nla_nest_cancel(msg->skb, prop); | |
737 | attr_msg_full: | |
738 | nla_nest_cancel(msg->skb, attrs); | |
739 | msg_full: | |
740 | genlmsg_cancel(msg->skb, hdr); | |
741 | ||
742 | return -EMSGSIZE; | |
743 | } | |
744 | ||
745 | int tipc_nl_bearer_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
746 | { | |
747 | int err; | |
748 | int i = cb->args[0]; | |
749 | struct tipc_bearer *bearer; | |
750 | struct tipc_nl_msg msg; | |
7f9f95d9 YX |
751 | struct net *net = sock_net(skb->sk); |
752 | struct tipc_net *tn = net_generic(net, tipc_net_id); | |
35b9dd76 RA |
753 | |
754 | if (i == MAX_BEARERS) | |
755 | return 0; | |
756 | ||
757 | msg.skb = skb; | |
758 | msg.portid = NETLINK_CB(cb->skb).portid; | |
759 | msg.seq = cb->nlh->nlmsg_seq; | |
760 | ||
761 | rtnl_lock(); | |
762 | for (i = 0; i < MAX_BEARERS; i++) { | |
7f9f95d9 | 763 | bearer = rtnl_dereference(tn->bearer_list[i]); |
35b9dd76 RA |
764 | if (!bearer) |
765 | continue; | |
766 | ||
f2f67390 | 767 | err = __tipc_nl_add_bearer(&msg, bearer, NLM_F_MULTI); |
35b9dd76 RA |
768 | if (err) |
769 | break; | |
770 | } | |
771 | rtnl_unlock(); | |
772 | ||
773 | cb->args[0] = i; | |
774 | return skb->len; | |
775 | } | |
776 | ||
777 | int tipc_nl_bearer_get(struct sk_buff *skb, struct genl_info *info) | |
778 | { | |
779 | int err; | |
780 | char *name; | |
781 | struct sk_buff *rep; | |
782 | struct tipc_bearer *bearer; | |
783 | struct tipc_nl_msg msg; | |
784 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
7f9f95d9 | 785 | struct net *net = genl_info_net(info); |
35b9dd76 RA |
786 | |
787 | if (!info->attrs[TIPC_NLA_BEARER]) | |
788 | return -EINVAL; | |
789 | ||
790 | err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX, | |
791 | info->attrs[TIPC_NLA_BEARER], | |
792 | tipc_nl_bearer_policy); | |
793 | if (err) | |
794 | return err; | |
795 | ||
796 | if (!attrs[TIPC_NLA_BEARER_NAME]) | |
797 | return -EINVAL; | |
798 | name = nla_data(attrs[TIPC_NLA_BEARER_NAME]); | |
799 | ||
800 | rep = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); | |
801 | if (!rep) | |
802 | return -ENOMEM; | |
803 | ||
804 | msg.skb = rep; | |
805 | msg.portid = info->snd_portid; | |
806 | msg.seq = info->snd_seq; | |
807 | ||
808 | rtnl_lock(); | |
7f9f95d9 | 809 | bearer = tipc_bearer_find(net, name); |
35b9dd76 RA |
810 | if (!bearer) { |
811 | err = -EINVAL; | |
812 | goto err_out; | |
813 | } | |
814 | ||
f2f67390 | 815 | err = __tipc_nl_add_bearer(&msg, bearer, 0); |
35b9dd76 RA |
816 | if (err) |
817 | goto err_out; | |
818 | rtnl_unlock(); | |
819 | ||
820 | return genlmsg_reply(rep, info); | |
821 | err_out: | |
822 | rtnl_unlock(); | |
823 | nlmsg_free(rep); | |
824 | ||
825 | return err; | |
826 | } | |
827 | ||
0655f6a8 RA |
828 | int tipc_nl_bearer_disable(struct sk_buff *skb, struct genl_info *info) |
829 | { | |
830 | int err; | |
831 | char *name; | |
832 | struct tipc_bearer *bearer; | |
833 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
9ab15465 | 834 | struct net *net = sock_net(skb->sk); |
0655f6a8 RA |
835 | |
836 | if (!info->attrs[TIPC_NLA_BEARER]) | |
837 | return -EINVAL; | |
838 | ||
839 | err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX, | |
840 | info->attrs[TIPC_NLA_BEARER], | |
841 | tipc_nl_bearer_policy); | |
842 | if (err) | |
843 | return err; | |
844 | ||
845 | if (!attrs[TIPC_NLA_BEARER_NAME]) | |
846 | return -EINVAL; | |
847 | ||
848 | name = nla_data(attrs[TIPC_NLA_BEARER_NAME]); | |
849 | ||
850 | rtnl_lock(); | |
7f9f95d9 | 851 | bearer = tipc_bearer_find(net, name); |
0655f6a8 RA |
852 | if (!bearer) { |
853 | rtnl_unlock(); | |
854 | return -EINVAL; | |
855 | } | |
856 | ||
b1c29f6b | 857 | bearer_disable(net, bearer); |
0655f6a8 RA |
858 | rtnl_unlock(); |
859 | ||
860 | return 0; | |
861 | } | |
862 | ||
863 | int tipc_nl_bearer_enable(struct sk_buff *skb, struct genl_info *info) | |
864 | { | |
865 | int err; | |
866 | char *bearer; | |
867 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
9ab15465 RA |
868 | struct net *net = sock_net(skb->sk); |
869 | struct tipc_net *tn = net_generic(net, tipc_net_id); | |
0655f6a8 RA |
870 | u32 domain; |
871 | u32 prio; | |
872 | ||
873 | prio = TIPC_MEDIA_LINK_PRI; | |
9ff26e9f | 874 | domain = tn->own_addr & TIPC_ZONE_CLUSTER_MASK; |
0655f6a8 RA |
875 | |
876 | if (!info->attrs[TIPC_NLA_BEARER]) | |
877 | return -EINVAL; | |
878 | ||
879 | err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX, | |
880 | info->attrs[TIPC_NLA_BEARER], | |
881 | tipc_nl_bearer_policy); | |
882 | if (err) | |
883 | return err; | |
884 | ||
885 | if (!attrs[TIPC_NLA_BEARER_NAME]) | |
886 | return -EINVAL; | |
887 | ||
888 | bearer = nla_data(attrs[TIPC_NLA_BEARER_NAME]); | |
889 | ||
890 | if (attrs[TIPC_NLA_BEARER_DOMAIN]) | |
891 | domain = nla_get_u32(attrs[TIPC_NLA_BEARER_DOMAIN]); | |
892 | ||
893 | if (attrs[TIPC_NLA_BEARER_PROP]) { | |
894 | struct nlattr *props[TIPC_NLA_PROP_MAX + 1]; | |
895 | ||
896 | err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_BEARER_PROP], | |
897 | props); | |
898 | if (err) | |
899 | return err; | |
900 | ||
901 | if (props[TIPC_NLA_PROP_PRIO]) | |
902 | prio = nla_get_u32(props[TIPC_NLA_PROP_PRIO]); | |
903 | } | |
904 | ||
905 | rtnl_lock(); | |
d0f91938 | 906 | err = tipc_enable_bearer(net, bearer, domain, prio, attrs); |
0655f6a8 RA |
907 | if (err) { |
908 | rtnl_unlock(); | |
909 | return err; | |
910 | } | |
911 | rtnl_unlock(); | |
912 | ||
913 | return 0; | |
914 | } | |
315c00bc | 915 | |
ef20cd4d RA |
916 | int tipc_nl_bearer_add(struct sk_buff *skb, struct genl_info *info) |
917 | { | |
918 | int err; | |
919 | char *name; | |
920 | struct tipc_bearer *b; | |
921 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
922 | struct net *net = sock_net(skb->sk); | |
923 | ||
924 | if (!info->attrs[TIPC_NLA_BEARER]) | |
925 | return -EINVAL; | |
926 | ||
927 | err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX, | |
928 | info->attrs[TIPC_NLA_BEARER], | |
929 | tipc_nl_bearer_policy); | |
930 | if (err) | |
931 | return err; | |
932 | ||
933 | if (!attrs[TIPC_NLA_BEARER_NAME]) | |
934 | return -EINVAL; | |
935 | name = nla_data(attrs[TIPC_NLA_BEARER_NAME]); | |
936 | ||
937 | rtnl_lock(); | |
938 | b = tipc_bearer_find(net, name); | |
939 | if (!b) { | |
940 | rtnl_unlock(); | |
941 | return -EINVAL; | |
942 | } | |
943 | ||
944 | #ifdef CONFIG_TIPC_MEDIA_UDP | |
945 | if (attrs[TIPC_NLA_BEARER_UDP_OPTS]) { | |
946 | err = tipc_udp_nl_bearer_add(b, | |
947 | attrs[TIPC_NLA_BEARER_UDP_OPTS]); | |
948 | if (err) { | |
949 | rtnl_unlock(); | |
950 | return err; | |
951 | } | |
952 | } | |
953 | #endif | |
954 | rtnl_unlock(); | |
955 | ||
956 | return 0; | |
957 | } | |
958 | ||
315c00bc RA |
959 | int tipc_nl_bearer_set(struct sk_buff *skb, struct genl_info *info) |
960 | { | |
961 | int err; | |
962 | char *name; | |
963 | struct tipc_bearer *b; | |
964 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
c3d6fb85 | 965 | struct net *net = sock_net(skb->sk); |
315c00bc RA |
966 | |
967 | if (!info->attrs[TIPC_NLA_BEARER]) | |
968 | return -EINVAL; | |
969 | ||
970 | err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX, | |
971 | info->attrs[TIPC_NLA_BEARER], | |
972 | tipc_nl_bearer_policy); | |
973 | if (err) | |
974 | return err; | |
975 | ||
976 | if (!attrs[TIPC_NLA_BEARER_NAME]) | |
977 | return -EINVAL; | |
978 | name = nla_data(attrs[TIPC_NLA_BEARER_NAME]); | |
979 | ||
980 | rtnl_lock(); | |
7f9f95d9 | 981 | b = tipc_bearer_find(net, name); |
315c00bc RA |
982 | if (!b) { |
983 | rtnl_unlock(); | |
984 | return -EINVAL; | |
985 | } | |
986 | ||
987 | if (attrs[TIPC_NLA_BEARER_PROP]) { | |
988 | struct nlattr *props[TIPC_NLA_PROP_MAX + 1]; | |
989 | ||
990 | err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_BEARER_PROP], | |
991 | props); | |
992 | if (err) { | |
993 | rtnl_unlock(); | |
994 | return err; | |
995 | } | |
996 | ||
997 | if (props[TIPC_NLA_PROP_TOL]) | |
998 | b->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]); | |
999 | if (props[TIPC_NLA_PROP_PRIO]) | |
1000 | b->priority = nla_get_u32(props[TIPC_NLA_PROP_PRIO]); | |
1001 | if (props[TIPC_NLA_PROP_WIN]) | |
1002 | b->window = nla_get_u32(props[TIPC_NLA_PROP_WIN]); | |
1003 | } | |
1004 | rtnl_unlock(); | |
1005 | ||
1006 | return 0; | |
1007 | } | |
46f15c67 | 1008 | |
d8182804 | 1009 | static int __tipc_nl_add_media(struct tipc_nl_msg *msg, |
f2f67390 | 1010 | struct tipc_media *media, int nlflags) |
46f15c67 RA |
1011 | { |
1012 | void *hdr; | |
1013 | struct nlattr *attrs; | |
1014 | struct nlattr *prop; | |
1015 | ||
bfb3e5dd | 1016 | hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family, |
f2f67390 | 1017 | nlflags, TIPC_NL_MEDIA_GET); |
46f15c67 RA |
1018 | if (!hdr) |
1019 | return -EMSGSIZE; | |
1020 | ||
1021 | attrs = nla_nest_start(msg->skb, TIPC_NLA_MEDIA); | |
1022 | if (!attrs) | |
1023 | goto msg_full; | |
1024 | ||
1025 | if (nla_put_string(msg->skb, TIPC_NLA_MEDIA_NAME, media->name)) | |
1026 | goto attr_msg_full; | |
1027 | ||
1028 | prop = nla_nest_start(msg->skb, TIPC_NLA_MEDIA_PROP); | |
1029 | if (!prop) | |
1030 | goto prop_msg_full; | |
1031 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, media->priority)) | |
1032 | goto prop_msg_full; | |
1033 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, media->tolerance)) | |
1034 | goto prop_msg_full; | |
1035 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, media->window)) | |
1036 | goto prop_msg_full; | |
1037 | ||
1038 | nla_nest_end(msg->skb, prop); | |
1039 | nla_nest_end(msg->skb, attrs); | |
1040 | genlmsg_end(msg->skb, hdr); | |
1041 | ||
1042 | return 0; | |
1043 | ||
1044 | prop_msg_full: | |
1045 | nla_nest_cancel(msg->skb, prop); | |
1046 | attr_msg_full: | |
1047 | nla_nest_cancel(msg->skb, attrs); | |
1048 | msg_full: | |
1049 | genlmsg_cancel(msg->skb, hdr); | |
1050 | ||
1051 | return -EMSGSIZE; | |
1052 | } | |
1053 | ||
1054 | int tipc_nl_media_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
1055 | { | |
1056 | int err; | |
1057 | int i = cb->args[0]; | |
1058 | struct tipc_nl_msg msg; | |
1059 | ||
1060 | if (i == MAX_MEDIA) | |
1061 | return 0; | |
1062 | ||
1063 | msg.skb = skb; | |
1064 | msg.portid = NETLINK_CB(cb->skb).portid; | |
1065 | msg.seq = cb->nlh->nlmsg_seq; | |
1066 | ||
1067 | rtnl_lock(); | |
1068 | for (; media_info_array[i] != NULL; i++) { | |
f2f67390 ND |
1069 | err = __tipc_nl_add_media(&msg, media_info_array[i], |
1070 | NLM_F_MULTI); | |
46f15c67 RA |
1071 | if (err) |
1072 | break; | |
1073 | } | |
1074 | rtnl_unlock(); | |
1075 | ||
1076 | cb->args[0] = i; | |
1077 | return skb->len; | |
1078 | } | |
1079 | ||
1080 | int tipc_nl_media_get(struct sk_buff *skb, struct genl_info *info) | |
1081 | { | |
1082 | int err; | |
1083 | char *name; | |
1084 | struct tipc_nl_msg msg; | |
1085 | struct tipc_media *media; | |
1086 | struct sk_buff *rep; | |
1087 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
1088 | ||
1089 | if (!info->attrs[TIPC_NLA_MEDIA]) | |
1090 | return -EINVAL; | |
1091 | ||
1092 | err = nla_parse_nested(attrs, TIPC_NLA_MEDIA_MAX, | |
1093 | info->attrs[TIPC_NLA_MEDIA], | |
1094 | tipc_nl_media_policy); | |
1095 | if (err) | |
1096 | return err; | |
1097 | ||
1098 | if (!attrs[TIPC_NLA_MEDIA_NAME]) | |
1099 | return -EINVAL; | |
1100 | name = nla_data(attrs[TIPC_NLA_MEDIA_NAME]); | |
1101 | ||
1102 | rep = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); | |
1103 | if (!rep) | |
1104 | return -ENOMEM; | |
1105 | ||
1106 | msg.skb = rep; | |
1107 | msg.portid = info->snd_portid; | |
1108 | msg.seq = info->snd_seq; | |
1109 | ||
1110 | rtnl_lock(); | |
1111 | media = tipc_media_find(name); | |
1112 | if (!media) { | |
1113 | err = -EINVAL; | |
1114 | goto err_out; | |
1115 | } | |
1116 | ||
f2f67390 | 1117 | err = __tipc_nl_add_media(&msg, media, 0); |
46f15c67 RA |
1118 | if (err) |
1119 | goto err_out; | |
1120 | rtnl_unlock(); | |
1121 | ||
1122 | return genlmsg_reply(rep, info); | |
1123 | err_out: | |
1124 | rtnl_unlock(); | |
1125 | nlmsg_free(rep); | |
1126 | ||
1127 | return err; | |
1128 | } | |
1e55417d RA |
1129 | |
1130 | int tipc_nl_media_set(struct sk_buff *skb, struct genl_info *info) | |
1131 | { | |
1132 | int err; | |
1133 | char *name; | |
1134 | struct tipc_media *m; | |
1135 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
1136 | ||
1137 | if (!info->attrs[TIPC_NLA_MEDIA]) | |
1138 | return -EINVAL; | |
1139 | ||
1140 | err = nla_parse_nested(attrs, TIPC_NLA_MEDIA_MAX, | |
1141 | info->attrs[TIPC_NLA_MEDIA], | |
1142 | tipc_nl_media_policy); | |
1143 | ||
1144 | if (!attrs[TIPC_NLA_MEDIA_NAME]) | |
1145 | return -EINVAL; | |
1146 | name = nla_data(attrs[TIPC_NLA_MEDIA_NAME]); | |
1147 | ||
1148 | rtnl_lock(); | |
1149 | m = tipc_media_find(name); | |
1150 | if (!m) { | |
1151 | rtnl_unlock(); | |
1152 | return -EINVAL; | |
1153 | } | |
1154 | ||
1155 | if (attrs[TIPC_NLA_MEDIA_PROP]) { | |
1156 | struct nlattr *props[TIPC_NLA_PROP_MAX + 1]; | |
1157 | ||
1158 | err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_MEDIA_PROP], | |
1159 | props); | |
1160 | if (err) { | |
1161 | rtnl_unlock(); | |
1162 | return err; | |
1163 | } | |
1164 | ||
1165 | if (props[TIPC_NLA_PROP_TOL]) | |
1166 | m->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]); | |
1167 | if (props[TIPC_NLA_PROP_PRIO]) | |
1168 | m->priority = nla_get_u32(props[TIPC_NLA_PROP_PRIO]); | |
1169 | if (props[TIPC_NLA_PROP_WIN]) | |
1170 | m->window = nla_get_u32(props[TIPC_NLA_PROP_WIN]); | |
1171 | } | |
1172 | rtnl_unlock(); | |
1173 | ||
1174 | return 0; | |
1175 | } |