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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" |
b97bf3fd | 45 | |
a29a194a | 46 | #define MAX_ADDR_STR 60 |
b97bf3fd | 47 | |
ef72a7e0 | 48 | static struct tipc_media * const media_info_array[] = { |
5702dbab JPM |
49 | ð_media_info, |
50 | #ifdef CONFIG_TIPC_MEDIA_IB | |
51 | &ib_media_info, | |
d0f91938 EH |
52 | #endif |
53 | #ifdef CONFIG_TIPC_MEDIA_UDP | |
54 | &udp_media_info, | |
5702dbab JPM |
55 | #endif |
56 | NULL | |
57 | }; | |
b97bf3fd | 58 | |
0d051bf9 JPM |
59 | static struct tipc_bearer *bearer_get(struct net *net, int bearer_id) |
60 | { | |
61 | struct tipc_net *tn = tipc_net(net); | |
62 | ||
63 | return rcu_dereference_rtnl(tn->bearer_list[bearer_id]); | |
64 | } | |
65 | ||
1a90632d | 66 | static void bearer_disable(struct net *net, struct tipc_bearer *b); |
3a777ff8 | 67 | |
b97bf3fd | 68 | /** |
5c216e1d | 69 | * tipc_media_find - locates specified media object by name |
b97bf3fd | 70 | */ |
358a0d1c | 71 | struct tipc_media *tipc_media_find(const char *name) |
b97bf3fd | 72 | { |
b97bf3fd PL |
73 | u32 i; |
74 | ||
ef72a7e0 JPM |
75 | for (i = 0; media_info_array[i] != NULL; i++) { |
76 | if (!strcmp(media_info_array[i]->name, name)) | |
5702dbab | 77 | break; |
b97bf3fd | 78 | } |
ef72a7e0 | 79 | return media_info_array[i]; |
b97bf3fd PL |
80 | } |
81 | ||
c79be454 AS |
82 | /** |
83 | * media_find_id - locates specified media object by type identifier | |
84 | */ | |
358a0d1c | 85 | static struct tipc_media *media_find_id(u8 type) |
c79be454 AS |
86 | { |
87 | u32 i; | |
88 | ||
ef72a7e0 JPM |
89 | for (i = 0; media_info_array[i] != NULL; i++) { |
90 | if (media_info_array[i]->type_id == type) | |
5702dbab | 91 | break; |
c79be454 | 92 | } |
ef72a7e0 | 93 | return media_info_array[i]; |
b97bf3fd PL |
94 | } |
95 | ||
96 | /** | |
4323add6 | 97 | * tipc_media_addr_printf - record media address in print buffer |
b97bf3fd | 98 | */ |
dc1aed37 | 99 | void tipc_media_addr_printf(char *buf, int len, struct tipc_media_addr *a) |
b97bf3fd | 100 | { |
c61b666e | 101 | char addr_str[MAX_ADDR_STR]; |
1a90632d | 102 | struct tipc_media *m; |
dc1aed37 | 103 | int ret; |
b97bf3fd | 104 | |
1a90632d | 105 | m = media_find_id(a->media_id); |
b97bf3fd | 106 | |
1a90632d JPM |
107 | if (m && !m->addr2str(a, addr_str, sizeof(addr_str))) |
108 | ret = scnprintf(buf, len, "%s(%s)", m->name, addr_str); | |
c61b666e | 109 | else { |
c61b666e | 110 | u32 i; |
b97bf3fd | 111 | |
941787b8 | 112 | ret = scnprintf(buf, len, "UNKNOWN(%u)", a->media_id); |
3d749a6a | 113 | for (i = 0; i < sizeof(a->value); i++) |
941787b8 | 114 | ret += scnprintf(buf - ret, len + ret, |
dc1aed37 | 115 | "-%02x", a->value[i]); |
b97bf3fd PL |
116 | } |
117 | } | |
118 | ||
b97bf3fd PL |
119 | /** |
120 | * bearer_name_validate - validate & (optionally) deconstruct bearer name | |
2c53040f BH |
121 | * @name: ptr to bearer name string |
122 | * @name_parts: ptr to area for bearer name components (or NULL if not needed) | |
c4307285 | 123 | * |
b97bf3fd PL |
124 | * Returns 1 if bearer name is valid, otherwise 0. |
125 | */ | |
c4307285 | 126 | static int bearer_name_validate(const char *name, |
f19765f4 | 127 | struct tipc_bearer_names *name_parts) |
b97bf3fd PL |
128 | { |
129 | char name_copy[TIPC_MAX_BEARER_NAME]; | |
130 | char *media_name; | |
131 | char *if_name; | |
132 | u32 media_len; | |
133 | u32 if_len; | |
134 | ||
135 | /* copy bearer name & ensure length is OK */ | |
b97bf3fd PL |
136 | name_copy[TIPC_MAX_BEARER_NAME - 1] = 0; |
137 | /* need above in case non-Posix strncpy() doesn't pad with nulls */ | |
138 | strncpy(name_copy, name, TIPC_MAX_BEARER_NAME); | |
139 | if (name_copy[TIPC_MAX_BEARER_NAME - 1] != 0) | |
140 | return 0; | |
141 | ||
142 | /* ensure all component parts of bearer name are present */ | |
b97bf3fd | 143 | media_name = name_copy; |
2db9983a AS |
144 | if_name = strchr(media_name, ':'); |
145 | if (if_name == NULL) | |
b97bf3fd PL |
146 | return 0; |
147 | *(if_name++) = 0; | |
148 | media_len = if_name - media_name; | |
149 | if_len = strlen(if_name) + 1; | |
150 | ||
151 | /* validate component parts of bearer name */ | |
c4307285 | 152 | if ((media_len <= 1) || (media_len > TIPC_MAX_MEDIA_NAME) || |
fc073938 | 153 | (if_len <= 1) || (if_len > TIPC_MAX_IF_NAME)) |
b97bf3fd PL |
154 | return 0; |
155 | ||
156 | /* return bearer name components, if necessary */ | |
b97bf3fd PL |
157 | if (name_parts) { |
158 | strcpy(name_parts->media_name, media_name); | |
159 | strcpy(name_parts->if_name, if_name); | |
160 | } | |
161 | return 1; | |
162 | } | |
163 | ||
164 | /** | |
5c216e1d | 165 | * tipc_bearer_find - locates bearer object with matching bearer name |
b97bf3fd | 166 | */ |
7f9f95d9 | 167 | struct tipc_bearer *tipc_bearer_find(struct net *net, const char *name) |
b97bf3fd | 168 | { |
7f9f95d9 | 169 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
1a90632d | 170 | struct tipc_bearer *b; |
b97bf3fd PL |
171 | u32 i; |
172 | ||
3874ccbb | 173 | for (i = 0; i < MAX_BEARERS; i++) { |
1a90632d JPM |
174 | b = rtnl_dereference(tn->bearer_list[i]); |
175 | if (b && (!strcmp(b->name, name))) | |
176 | return b; | |
b97bf3fd | 177 | } |
1fc54d8f | 178 | return NULL; |
b97bf3fd PL |
179 | } |
180 | ||
ff0d3e78 PB |
181 | /* tipc_bearer_get_name - get the bearer name from its id. |
182 | * @net: network namespace | |
183 | * @name: a pointer to the buffer where the name will be stored. | |
184 | * @bearer_id: the id to get the name from. | |
185 | */ | |
186 | int tipc_bearer_get_name(struct net *net, char *name, u32 bearer_id) | |
187 | { | |
188 | struct tipc_net *tn = tipc_net(net); | |
189 | struct tipc_bearer *b; | |
190 | ||
191 | if (bearer_id >= MAX_BEARERS) | |
192 | return -EINVAL; | |
193 | ||
194 | b = rtnl_dereference(tn->bearer_list[bearer_id]); | |
195 | if (!b) | |
196 | return -EINVAL; | |
197 | ||
198 | strcpy(name, b->name); | |
199 | return 0; | |
200 | } | |
201 | ||
7f9f95d9 | 202 | void tipc_bearer_add_dest(struct net *net, u32 bearer_id, u32 dest) |
b97bf3fd | 203 | { |
7f9f95d9 | 204 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
1a90632d | 205 | struct tipc_bearer *b; |
7a2f7d18 YX |
206 | |
207 | rcu_read_lock(); | |
1a90632d JPM |
208 | b = rcu_dereference_rtnl(tn->bearer_list[bearer_id]); |
209 | if (b) | |
210 | tipc_disc_add_dest(b->link_req); | |
7a2f7d18 | 211 | rcu_read_unlock(); |
b97bf3fd PL |
212 | } |
213 | ||
7f9f95d9 | 214 | void tipc_bearer_remove_dest(struct net *net, u32 bearer_id, u32 dest) |
b97bf3fd | 215 | { |
7f9f95d9 | 216 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
1a90632d | 217 | struct tipc_bearer *b; |
7a2f7d18 YX |
218 | |
219 | rcu_read_lock(); | |
1a90632d JPM |
220 | b = rcu_dereference_rtnl(tn->bearer_list[bearer_id]); |
221 | if (b) | |
222 | tipc_disc_remove_dest(b->link_req); | |
7a2f7d18 | 223 | rcu_read_unlock(); |
b97bf3fd PL |
224 | } |
225 | ||
b97bf3fd PL |
226 | /** |
227 | * tipc_enable_bearer - enable bearer with the given name | |
c4307285 | 228 | */ |
9ab15465 | 229 | static int tipc_enable_bearer(struct net *net, const char *name, |
d0f91938 EH |
230 | u32 disc_domain, u32 priority, |
231 | struct nlattr *attr[]) | |
b97bf3fd | 232 | { |
7f9f95d9 | 233 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
1a90632d JPM |
234 | struct tipc_bearer *b; |
235 | struct tipc_media *m; | |
f19765f4 | 236 | struct tipc_bearer_names b_names; |
4e801fa1 | 237 | struct sk_buff *skb; |
b97bf3fd PL |
238 | char addr_string[16]; |
239 | u32 bearer_id; | |
240 | u32 with_this_prio; | |
241 | u32 i; | |
242 | int res = -EINVAL; | |
243 | ||
34747539 | 244 | if (!tn->own_addr) { |
2cf8aa19 EH |
245 | pr_warn("Bearer <%s> rejected, not supported in standalone mode\n", |
246 | name); | |
b97bf3fd | 247 | return -ENOPROTOOPT; |
a10bd924 | 248 | } |
f19765f4 | 249 | if (!bearer_name_validate(name, &b_names)) { |
2cf8aa19 | 250 | pr_warn("Bearer <%s> rejected, illegal name\n", name); |
16cb4b33 | 251 | return -EINVAL; |
a10bd924 | 252 | } |
66e019a6 | 253 | if (tipc_addr_domain_valid(disc_domain) && |
34747539 YX |
254 | (disc_domain != tn->own_addr)) { |
255 | if (tipc_in_scope(disc_domain, tn->own_addr)) { | |
9ff26e9f | 256 | disc_domain = tn->own_addr & TIPC_ZONE_CLUSTER_MASK; |
66e019a6 | 257 | res = 0; /* accept any node in own cluster */ |
34747539 | 258 | } else if (in_own_cluster_exact(net, disc_domain)) |
66e019a6 AS |
259 | res = 0; /* accept specified node in own cluster */ |
260 | } | |
261 | if (res) { | |
2cf8aa19 EH |
262 | pr_warn("Bearer <%s> rejected, illegal discovery domain\n", |
263 | name); | |
a10bd924 AS |
264 | return -EINVAL; |
265 | } | |
9efde4a0 | 266 | if ((priority > TIPC_MAX_LINK_PRI) && |
a10bd924 | 267 | (priority != TIPC_MEDIA_LINK_PRI)) { |
2cf8aa19 | 268 | pr_warn("Bearer <%s> rejected, illegal priority\n", name); |
b97bf3fd | 269 | return -EINVAL; |
a10bd924 | 270 | } |
b97bf3fd | 271 | |
1a90632d JPM |
272 | m = tipc_media_find(b_names.media_name); |
273 | if (!m) { | |
2cf8aa19 EH |
274 | pr_warn("Bearer <%s> rejected, media <%s> not registered\n", |
275 | name, b_names.media_name); | |
7216cd94 | 276 | return -EINVAL; |
b97bf3fd | 277 | } |
16cb4b33 PL |
278 | |
279 | if (priority == TIPC_MEDIA_LINK_PRI) | |
1a90632d | 280 | priority = m->priority; |
b97bf3fd PL |
281 | |
282 | restart: | |
283 | bearer_id = MAX_BEARERS; | |
284 | with_this_prio = 1; | |
285 | for (i = MAX_BEARERS; i-- != 0; ) { | |
1a90632d JPM |
286 | b = rtnl_dereference(tn->bearer_list[i]); |
287 | if (!b) { | |
b97bf3fd PL |
288 | bearer_id = i; |
289 | continue; | |
290 | } | |
1a90632d | 291 | if (!strcmp(name, b->name)) { |
2cf8aa19 EH |
292 | pr_warn("Bearer <%s> rejected, already enabled\n", |
293 | name); | |
7216cd94 | 294 | return -EINVAL; |
b97bf3fd | 295 | } |
1a90632d | 296 | if ((b->priority == priority) && |
b97bf3fd PL |
297 | (++with_this_prio > 2)) { |
298 | if (priority-- == 0) { | |
2cf8aa19 EH |
299 | pr_warn("Bearer <%s> rejected, duplicate priority\n", |
300 | name); | |
7216cd94 | 301 | return -EINVAL; |
b97bf3fd | 302 | } |
2cf8aa19 EH |
303 | pr_warn("Bearer <%s> priority adjustment required %u->%u\n", |
304 | name, priority + 1, priority); | |
b97bf3fd PL |
305 | goto restart; |
306 | } | |
307 | } | |
308 | if (bearer_id >= MAX_BEARERS) { | |
2cf8aa19 EH |
309 | pr_warn("Bearer <%s> rejected, bearer limit reached (%u)\n", |
310 | name, MAX_BEARERS); | |
7216cd94 | 311 | return -EINVAL; |
b97bf3fd PL |
312 | } |
313 | ||
1a90632d JPM |
314 | b = kzalloc(sizeof(*b), GFP_ATOMIC); |
315 | if (!b) | |
7216cd94 YX |
316 | return -ENOMEM; |
317 | ||
1a90632d JPM |
318 | strcpy(b->name, name); |
319 | b->media = m; | |
320 | res = m->enable_media(net, b, attr); | |
b97bf3fd | 321 | if (res) { |
2cf8aa19 EH |
322 | pr_warn("Bearer <%s> rejected, enable failure (%d)\n", |
323 | name, -res); | |
7216cd94 | 324 | return -EINVAL; |
b97bf3fd PL |
325 | } |
326 | ||
1a90632d JPM |
327 | b->identity = bearer_id; |
328 | b->tolerance = m->tolerance; | |
329 | b->window = m->window; | |
330 | b->domain = disc_domain; | |
331 | b->net_plane = bearer_id + 'A'; | |
332 | b->priority = priority; | |
0d051bf9 | 333 | test_and_set_bit_lock(0, &b->up); |
3a777ff8 | 334 | |
4e801fa1 | 335 | res = tipc_disc_create(net, b, &b->bcast_addr, &skb); |
3a777ff8 | 336 | if (res) { |
1a90632d | 337 | bearer_disable(net, b); |
2cf8aa19 EH |
338 | pr_warn("Bearer <%s> rejected, discovery object creation failed\n", |
339 | name); | |
7216cd94 | 340 | return -EINVAL; |
3a777ff8 | 341 | } |
3874ccbb | 342 | |
1a90632d | 343 | rcu_assign_pointer(tn->bearer_list[bearer_id], b); |
4e801fa1 JPM |
344 | if (skb) |
345 | tipc_bearer_xmit_skb(net, bearer_id, skb, &b->bcast_addr); | |
35c55c98 JPM |
346 | |
347 | if (tipc_mon_create(net, bearer_id)) | |
348 | return -ENOMEM; | |
349 | ||
2cf8aa19 EH |
350 | pr_info("Enabled bearer <%s>, discovery domain %s, priority %u\n", |
351 | name, | |
352 | tipc_addr_string_fill(addr_string, disc_domain), priority); | |
b97bf3fd PL |
353 | return res; |
354 | } | |
355 | ||
356 | /** | |
512137ee | 357 | * tipc_reset_bearer - Reset all links established over this bearer |
b97bf3fd | 358 | */ |
1a90632d | 359 | static int tipc_reset_bearer(struct net *net, struct tipc_bearer *b) |
b97bf3fd | 360 | { |
1a90632d JPM |
361 | pr_info("Resetting bearer <%s>\n", b->name); |
362 | tipc_node_delete_links(net, b->identity); | |
363 | tipc_disc_reset(net, b); | |
0e35fd5e | 364 | return 0; |
b97bf3fd PL |
365 | } |
366 | ||
1fc07f3e JPM |
367 | /* tipc_bearer_reset_all - reset all links on all bearers |
368 | */ | |
369 | void tipc_bearer_reset_all(struct net *net) | |
370 | { | |
1fc07f3e JPM |
371 | struct tipc_bearer *b; |
372 | int i; | |
373 | ||
374 | for (i = 0; i < MAX_BEARERS; i++) { | |
0d051bf9 JPM |
375 | b = bearer_get(net, i); |
376 | if (b) | |
377 | clear_bit_unlock(0, &b->up); | |
378 | } | |
379 | for (i = 0; i < MAX_BEARERS; i++) { | |
380 | b = bearer_get(net, i); | |
1fc07f3e JPM |
381 | if (b) |
382 | tipc_reset_bearer(net, b); | |
383 | } | |
0d051bf9 JPM |
384 | for (i = 0; i < MAX_BEARERS; i++) { |
385 | b = bearer_get(net, i); | |
386 | if (b) | |
387 | test_and_set_bit_lock(0, &b->up); | |
388 | } | |
1fc07f3e JPM |
389 | } |
390 | ||
b97bf3fd | 391 | /** |
617d3c7a | 392 | * bearer_disable |
c4307285 | 393 | * |
7216cd94 | 394 | * Note: This routine assumes caller holds RTNL lock. |
b97bf3fd | 395 | */ |
1a90632d | 396 | static void bearer_disable(struct net *net, struct tipc_bearer *b) |
b97bf3fd | 397 | { |
5b7066c3 JPM |
398 | struct tipc_net *tn = tipc_net(net); |
399 | int bearer_id = b->identity; | |
3874ccbb | 400 | |
1a90632d | 401 | pr_info("Disabling bearer <%s>\n", b->name); |
0d051bf9 | 402 | clear_bit_unlock(0, &b->up); |
5b7066c3 | 403 | tipc_node_delete_links(net, bearer_id); |
0d051bf9 | 404 | b->media->disable_media(b); |
1a90632d JPM |
405 | RCU_INIT_POINTER(b->media_ptr, NULL); |
406 | if (b->link_req) | |
407 | tipc_disc_delete(b->link_req); | |
5b7066c3 | 408 | RCU_INIT_POINTER(tn->bearer_list[bearer_id], NULL); |
1a90632d | 409 | kfree_rcu(b, rcu); |
35c55c98 | 410 | tipc_mon_delete(net, bearer_id); |
b97bf3fd PL |
411 | } |
412 | ||
d0f91938 EH |
413 | int tipc_enable_l2_media(struct net *net, struct tipc_bearer *b, |
414 | struct nlattr *attr[]) | |
e4d050cb YX |
415 | { |
416 | struct net_device *dev; | |
417 | char *driver_name = strchr((const char *)b->name, ':') + 1; | |
418 | ||
419 | /* Find device with specified name */ | |
7f9f95d9 | 420 | dev = dev_get_by_name(net, driver_name); |
e4d050cb YX |
421 | if (!dev) |
422 | return -ENODEV; | |
423 | ||
38504c28 | 424 | /* Associate TIPC bearer with L2 bearer */ |
2231c5af | 425 | rcu_assign_pointer(b->media_ptr, dev); |
38504c28 | 426 | memset(&b->bcast_addr, 0, sizeof(b->bcast_addr)); |
e4d050cb YX |
427 | memcpy(b->bcast_addr.value, dev->broadcast, b->media->hwaddr_len); |
428 | b->bcast_addr.media_id = b->media->type_id; | |
429 | b->bcast_addr.broadcast = 1; | |
430 | b->mtu = dev->mtu; | |
38504c28 | 431 | b->media->raw2addr(b, &b->addr, (char *)dev->dev_addr); |
e4d050cb YX |
432 | rcu_assign_pointer(dev->tipc_ptr, b); |
433 | return 0; | |
434 | } | |
435 | ||
38504c28 | 436 | /* tipc_disable_l2_media - detach TIPC bearer from an L2 interface |
e4d050cb | 437 | * |
282b3a05 | 438 | * Mark L2 bearer as inactive so that incoming buffers are thrown away |
e4d050cb YX |
439 | */ |
440 | void tipc_disable_l2_media(struct tipc_bearer *b) | |
441 | { | |
2231c5af YX |
442 | struct net_device *dev; |
443 | ||
444 | dev = (struct net_device *)rtnl_dereference(b->media_ptr); | |
e4d050cb | 445 | RCU_INIT_POINTER(dev->tipc_ptr, NULL); |
f1c8d8cb | 446 | synchronize_net(); |
e4d050cb YX |
447 | dev_put(dev); |
448 | } | |
449 | ||
450 | /** | |
38504c28 | 451 | * tipc_l2_send_msg - send a TIPC packet out over an L2 interface |
5b7066c3 | 452 | * @skb: the packet to be sent |
1a90632d | 453 | * @b: the bearer through which the packet is to be sent |
e4d050cb YX |
454 | * @dest: peer destination address |
455 | */ | |
7214bcf8 | 456 | int tipc_l2_send_msg(struct net *net, struct sk_buff *skb, |
1da46568 | 457 | struct tipc_bearer *b, struct tipc_media_addr *dest) |
e4d050cb | 458 | { |
2231c5af | 459 | struct net_device *dev; |
e4d050cb | 460 | int delta; |
2231c5af YX |
461 | |
462 | dev = (struct net_device *)rcu_dereference_rtnl(b->media_ptr); | |
463 | if (!dev) | |
464 | return 0; | |
e4d050cb | 465 | |
0d051bf9 JPM |
466 | delta = SKB_DATA_ALIGN(dev->hard_header_len - skb_headroom(skb)); |
467 | if ((delta > 0) && pskb_expand_head(skb, delta, 0, GFP_ATOMIC)) { | |
468 | kfree_skb(skb); | |
469 | return 0; | |
470 | } | |
7214bcf8 JPM |
471 | skb_reset_network_header(skb); |
472 | skb->dev = dev; | |
473 | skb->protocol = htons(ETH_P_TIPC); | |
474 | dev_hard_header(skb, dev, ETH_P_TIPC, dest->value, | |
475 | dev->dev_addr, skb->len); | |
476 | dev_queue_xmit(skb); | |
e4d050cb YX |
477 | return 0; |
478 | } | |
479 | ||
959e1781 JPM |
480 | int tipc_bearer_mtu(struct net *net, u32 bearer_id) |
481 | { | |
482 | int mtu = 0; | |
483 | struct tipc_bearer *b; | |
484 | ||
485 | rcu_read_lock(); | |
486 | b = rcu_dereference_rtnl(tipc_net(net)->bearer_list[bearer_id]); | |
487 | if (b) | |
488 | mtu = b->mtu; | |
489 | rcu_read_unlock(); | |
490 | return mtu; | |
491 | } | |
492 | ||
60852d67 JPM |
493 | /* tipc_bearer_xmit_skb - sends buffer to destination over bearer |
494 | */ | |
495 | void tipc_bearer_xmit_skb(struct net *net, u32 bearer_id, | |
496 | struct sk_buff *skb, | |
497 | struct tipc_media_addr *dest) | |
498 | { | |
0d051bf9 | 499 | struct tipc_msg *hdr = buf_msg(skb); |
60852d67 JPM |
500 | struct tipc_bearer *b; |
501 | ||
502 | rcu_read_lock(); | |
0d051bf9 JPM |
503 | b = bearer_get(net, bearer_id); |
504 | if (likely(b && (test_bit(0, &b->up) || msg_is_reset(hdr)))) | |
60852d67 | 505 | b->media->send_msg(net, skb, b, dest); |
4e801fa1 JPM |
506 | else |
507 | kfree_skb(skb); | |
60852d67 | 508 | rcu_read_unlock(); |
60852d67 JPM |
509 | } |
510 | ||
af9b028e JPM |
511 | /* tipc_bearer_xmit() -send buffer to destination over bearer |
512 | */ | |
513 | void tipc_bearer_xmit(struct net *net, u32 bearer_id, | |
514 | struct sk_buff_head *xmitq, | |
515 | struct tipc_media_addr *dst) | |
516 | { | |
af9b028e JPM |
517 | struct tipc_bearer *b; |
518 | struct sk_buff *skb, *tmp; | |
519 | ||
520 | if (skb_queue_empty(xmitq)) | |
521 | return; | |
522 | ||
523 | rcu_read_lock(); | |
0d051bf9 | 524 | b = bearer_get(net, bearer_id); |
4e801fa1 JPM |
525 | if (unlikely(!b)) |
526 | __skb_queue_purge(xmitq); | |
527 | skb_queue_walk_safe(xmitq, skb, tmp) { | |
528 | __skb_dequeue(xmitq); | |
0d051bf9 JPM |
529 | if (likely(test_bit(0, &b->up) || msg_is_reset(buf_msg(skb)))) |
530 | b->media->send_msg(net, skb, b, dst); | |
531 | else | |
532 | kfree(skb); | |
b06b281e JPM |
533 | } |
534 | rcu_read_unlock(); | |
535 | } | |
536 | ||
537 | /* tipc_bearer_bc_xmit() - broadcast buffers to all destinations | |
538 | */ | |
539 | void tipc_bearer_bc_xmit(struct net *net, u32 bearer_id, | |
540 | struct sk_buff_head *xmitq) | |
541 | { | |
542 | struct tipc_net *tn = tipc_net(net); | |
543 | int net_id = tn->net_id; | |
544 | struct tipc_bearer *b; | |
545 | struct sk_buff *skb, *tmp; | |
546 | struct tipc_msg *hdr; | |
547 | ||
548 | rcu_read_lock(); | |
0d051bf9 JPM |
549 | b = bearer_get(net, bearer_id); |
550 | if (unlikely(!b || !test_bit(0, &b->up))) | |
4e801fa1 JPM |
551 | __skb_queue_purge(xmitq); |
552 | skb_queue_walk_safe(xmitq, skb, tmp) { | |
553 | hdr = buf_msg(skb); | |
554 | msg_set_non_seq(hdr, 1); | |
555 | msg_set_mc_netid(hdr, net_id); | |
556 | __skb_dequeue(xmitq); | |
557 | b->media->send_msg(net, skb, b, &b->bcast_addr); | |
af9b028e JPM |
558 | } |
559 | rcu_read_unlock(); | |
560 | } | |
561 | ||
6e967adf YX |
562 | /** |
563 | * tipc_l2_rcv_msg - handle incoming TIPC message from an interface | |
564 | * @buf: the received packet | |
565 | * @dev: the net device that the packet was received on | |
566 | * @pt: the packet_type structure which was used to register this handler | |
567 | * @orig_dev: the original receive net device in case the device is a bond | |
568 | * | |
569 | * Accept only packets explicitly sent to this node, or broadcast packets; | |
570 | * ignores packets sent using interface multicast, and traffic sent to other | |
571 | * nodes (which can happen if interface is running in promiscuous mode). | |
572 | */ | |
4e801fa1 | 573 | static int tipc_l2_rcv_msg(struct sk_buff *skb, struct net_device *dev, |
6e967adf YX |
574 | struct packet_type *pt, struct net_device *orig_dev) |
575 | { | |
1a90632d | 576 | struct tipc_bearer *b; |
6e967adf | 577 | |
6e967adf | 578 | rcu_read_lock(); |
1a90632d | 579 | b = rcu_dereference_rtnl(dev->tipc_ptr); |
0d051bf9 JPM |
580 | if (likely(b && test_bit(0, &b->up) && |
581 | (skb->pkt_type <= PACKET_BROADCAST))) { | |
4e801fa1 JPM |
582 | skb->next = NULL; |
583 | tipc_rcv(dev_net(dev), skb, b); | |
584 | rcu_read_unlock(); | |
585 | return NET_RX_SUCCESS; | |
6e967adf YX |
586 | } |
587 | rcu_read_unlock(); | |
4e801fa1 | 588 | kfree_skb(skb); |
6e967adf YX |
589 | return NET_RX_DROP; |
590 | } | |
591 | ||
592 | /** | |
593 | * tipc_l2_device_event - handle device events from network device | |
594 | * @nb: the context of the notification | |
595 | * @evt: the type of event | |
596 | * @ptr: the net device that the event was on | |
597 | * | |
598 | * This function is called by the Ethernet driver in case of link | |
599 | * change event. | |
600 | */ | |
601 | static int tipc_l2_device_event(struct notifier_block *nb, unsigned long evt, | |
602 | void *ptr) | |
603 | { | |
6e967adf | 604 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
c93d3baa | 605 | struct net *net = dev_net(dev); |
1a90632d | 606 | struct tipc_bearer *b; |
6e967adf | 607 | |
1a90632d JPM |
608 | b = rtnl_dereference(dev->tipc_ptr); |
609 | if (!b) | |
6e967adf | 610 | return NOTIFY_DONE; |
6e967adf | 611 | |
1a90632d | 612 | b->mtu = dev->mtu; |
6e967adf YX |
613 | |
614 | switch (evt) { | |
615 | case NETDEV_CHANGE: | |
616 | if (netif_carrier_ok(dev)) | |
617 | break; | |
5b7066c3 | 618 | case NETDEV_UP: |
0d051bf9 | 619 | test_and_set_bit_lock(0, &b->up); |
5b7066c3 | 620 | break; |
282b3a05 | 621 | case NETDEV_GOING_DOWN: |
0d051bf9 | 622 | clear_bit_unlock(0, &b->up); |
5b7066c3 JPM |
623 | tipc_reset_bearer(net, b); |
624 | break; | |
6e967adf | 625 | case NETDEV_CHANGEMTU: |
1a90632d | 626 | tipc_reset_bearer(net, b); |
a21a584d | 627 | break; |
6e967adf | 628 | case NETDEV_CHANGEADDR: |
1a90632d | 629 | b->media->raw2addr(b, &b->addr, |
5b7066c3 | 630 | (char *)dev->dev_addr); |
1a90632d | 631 | tipc_reset_bearer(net, b); |
6e967adf YX |
632 | break; |
633 | case NETDEV_UNREGISTER: | |
634 | case NETDEV_CHANGENAME: | |
1a90632d | 635 | bearer_disable(dev_net(dev), b); |
6e967adf YX |
636 | break; |
637 | } | |
6e967adf YX |
638 | return NOTIFY_OK; |
639 | } | |
640 | ||
641 | static struct packet_type tipc_packet_type __read_mostly = { | |
184593c7 | 642 | .type = htons(ETH_P_TIPC), |
6e967adf YX |
643 | .func = tipc_l2_rcv_msg, |
644 | }; | |
645 | ||
646 | static struct notifier_block notifier = { | |
647 | .notifier_call = tipc_l2_device_event, | |
648 | .priority = 0, | |
649 | }; | |
650 | ||
651 | int tipc_bearer_setup(void) | |
652 | { | |
970122fd YX |
653 | int err; |
654 | ||
655 | err = register_netdevice_notifier(¬ifier); | |
656 | if (err) | |
657 | return err; | |
6e967adf | 658 | dev_add_pack(&tipc_packet_type); |
970122fd | 659 | return 0; |
6e967adf YX |
660 | } |
661 | ||
662 | void tipc_bearer_cleanup(void) | |
663 | { | |
664 | unregister_netdevice_notifier(¬ifier); | |
665 | dev_remove_pack(&tipc_packet_type); | |
666 | } | |
b97bf3fd | 667 | |
f2f9800d | 668 | void tipc_bearer_stop(struct net *net) |
b97bf3fd | 669 | { |
7f9f95d9 | 670 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
1a90632d | 671 | struct tipc_bearer *b; |
b97bf3fd PL |
672 | u32 i; |
673 | ||
b97bf3fd | 674 | for (i = 0; i < MAX_BEARERS; i++) { |
1a90632d JPM |
675 | b = rtnl_dereference(tn->bearer_list[i]); |
676 | if (b) { | |
677 | bearer_disable(net, b); | |
7f9f95d9 | 678 | tn->bearer_list[i] = NULL; |
3874ccbb | 679 | } |
b97bf3fd | 680 | } |
b97bf3fd | 681 | } |
0655f6a8 | 682 | |
35b9dd76 | 683 | /* Caller should hold rtnl_lock to protect the bearer */ |
d8182804 | 684 | static int __tipc_nl_add_bearer(struct tipc_nl_msg *msg, |
f2f67390 | 685 | struct tipc_bearer *bearer, int nlflags) |
35b9dd76 RA |
686 | { |
687 | void *hdr; | |
688 | struct nlattr *attrs; | |
689 | struct nlattr *prop; | |
690 | ||
bfb3e5dd | 691 | hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family, |
f2f67390 | 692 | nlflags, TIPC_NL_BEARER_GET); |
35b9dd76 RA |
693 | if (!hdr) |
694 | return -EMSGSIZE; | |
695 | ||
696 | attrs = nla_nest_start(msg->skb, TIPC_NLA_BEARER); | |
697 | if (!attrs) | |
698 | goto msg_full; | |
699 | ||
700 | if (nla_put_string(msg->skb, TIPC_NLA_BEARER_NAME, bearer->name)) | |
701 | goto attr_msg_full; | |
702 | ||
703 | prop = nla_nest_start(msg->skb, TIPC_NLA_BEARER_PROP); | |
704 | if (!prop) | |
705 | goto prop_msg_full; | |
706 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, bearer->priority)) | |
707 | goto prop_msg_full; | |
708 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, bearer->tolerance)) | |
709 | goto prop_msg_full; | |
710 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, bearer->window)) | |
711 | goto prop_msg_full; | |
712 | ||
713 | nla_nest_end(msg->skb, prop); | |
714 | nla_nest_end(msg->skb, attrs); | |
715 | genlmsg_end(msg->skb, hdr); | |
716 | ||
717 | return 0; | |
718 | ||
719 | prop_msg_full: | |
720 | nla_nest_cancel(msg->skb, prop); | |
721 | attr_msg_full: | |
722 | nla_nest_cancel(msg->skb, attrs); | |
723 | msg_full: | |
724 | genlmsg_cancel(msg->skb, hdr); | |
725 | ||
726 | return -EMSGSIZE; | |
727 | } | |
728 | ||
729 | int tipc_nl_bearer_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
730 | { | |
731 | int err; | |
732 | int i = cb->args[0]; | |
733 | struct tipc_bearer *bearer; | |
734 | struct tipc_nl_msg msg; | |
7f9f95d9 YX |
735 | struct net *net = sock_net(skb->sk); |
736 | struct tipc_net *tn = net_generic(net, tipc_net_id); | |
35b9dd76 RA |
737 | |
738 | if (i == MAX_BEARERS) | |
739 | return 0; | |
740 | ||
741 | msg.skb = skb; | |
742 | msg.portid = NETLINK_CB(cb->skb).portid; | |
743 | msg.seq = cb->nlh->nlmsg_seq; | |
744 | ||
745 | rtnl_lock(); | |
746 | for (i = 0; i < MAX_BEARERS; i++) { | |
7f9f95d9 | 747 | bearer = rtnl_dereference(tn->bearer_list[i]); |
35b9dd76 RA |
748 | if (!bearer) |
749 | continue; | |
750 | ||
f2f67390 | 751 | err = __tipc_nl_add_bearer(&msg, bearer, NLM_F_MULTI); |
35b9dd76 RA |
752 | if (err) |
753 | break; | |
754 | } | |
755 | rtnl_unlock(); | |
756 | ||
757 | cb->args[0] = i; | |
758 | return skb->len; | |
759 | } | |
760 | ||
761 | int tipc_nl_bearer_get(struct sk_buff *skb, struct genl_info *info) | |
762 | { | |
763 | int err; | |
764 | char *name; | |
765 | struct sk_buff *rep; | |
766 | struct tipc_bearer *bearer; | |
767 | struct tipc_nl_msg msg; | |
768 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
7f9f95d9 | 769 | struct net *net = genl_info_net(info); |
35b9dd76 RA |
770 | |
771 | if (!info->attrs[TIPC_NLA_BEARER]) | |
772 | return -EINVAL; | |
773 | ||
774 | err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX, | |
775 | info->attrs[TIPC_NLA_BEARER], | |
776 | tipc_nl_bearer_policy); | |
777 | if (err) | |
778 | return err; | |
779 | ||
780 | if (!attrs[TIPC_NLA_BEARER_NAME]) | |
781 | return -EINVAL; | |
782 | name = nla_data(attrs[TIPC_NLA_BEARER_NAME]); | |
783 | ||
784 | rep = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); | |
785 | if (!rep) | |
786 | return -ENOMEM; | |
787 | ||
788 | msg.skb = rep; | |
789 | msg.portid = info->snd_portid; | |
790 | msg.seq = info->snd_seq; | |
791 | ||
792 | rtnl_lock(); | |
7f9f95d9 | 793 | bearer = tipc_bearer_find(net, name); |
35b9dd76 RA |
794 | if (!bearer) { |
795 | err = -EINVAL; | |
796 | goto err_out; | |
797 | } | |
798 | ||
f2f67390 | 799 | err = __tipc_nl_add_bearer(&msg, bearer, 0); |
35b9dd76 RA |
800 | if (err) |
801 | goto err_out; | |
802 | rtnl_unlock(); | |
803 | ||
804 | return genlmsg_reply(rep, info); | |
805 | err_out: | |
806 | rtnl_unlock(); | |
807 | nlmsg_free(rep); | |
808 | ||
809 | return err; | |
810 | } | |
811 | ||
0655f6a8 RA |
812 | int tipc_nl_bearer_disable(struct sk_buff *skb, struct genl_info *info) |
813 | { | |
814 | int err; | |
815 | char *name; | |
816 | struct tipc_bearer *bearer; | |
817 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
9ab15465 | 818 | struct net *net = sock_net(skb->sk); |
0655f6a8 RA |
819 | |
820 | if (!info->attrs[TIPC_NLA_BEARER]) | |
821 | return -EINVAL; | |
822 | ||
823 | err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX, | |
824 | info->attrs[TIPC_NLA_BEARER], | |
825 | tipc_nl_bearer_policy); | |
826 | if (err) | |
827 | return err; | |
828 | ||
829 | if (!attrs[TIPC_NLA_BEARER_NAME]) | |
830 | return -EINVAL; | |
831 | ||
832 | name = nla_data(attrs[TIPC_NLA_BEARER_NAME]); | |
833 | ||
834 | rtnl_lock(); | |
7f9f95d9 | 835 | bearer = tipc_bearer_find(net, name); |
0655f6a8 RA |
836 | if (!bearer) { |
837 | rtnl_unlock(); | |
838 | return -EINVAL; | |
839 | } | |
840 | ||
b1c29f6b | 841 | bearer_disable(net, bearer); |
0655f6a8 RA |
842 | rtnl_unlock(); |
843 | ||
844 | return 0; | |
845 | } | |
846 | ||
847 | int tipc_nl_bearer_enable(struct sk_buff *skb, struct genl_info *info) | |
848 | { | |
849 | int err; | |
850 | char *bearer; | |
851 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
9ab15465 RA |
852 | struct net *net = sock_net(skb->sk); |
853 | struct tipc_net *tn = net_generic(net, tipc_net_id); | |
0655f6a8 RA |
854 | u32 domain; |
855 | u32 prio; | |
856 | ||
857 | prio = TIPC_MEDIA_LINK_PRI; | |
9ff26e9f | 858 | domain = tn->own_addr & TIPC_ZONE_CLUSTER_MASK; |
0655f6a8 RA |
859 | |
860 | if (!info->attrs[TIPC_NLA_BEARER]) | |
861 | return -EINVAL; | |
862 | ||
863 | err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX, | |
864 | info->attrs[TIPC_NLA_BEARER], | |
865 | tipc_nl_bearer_policy); | |
866 | if (err) | |
867 | return err; | |
868 | ||
869 | if (!attrs[TIPC_NLA_BEARER_NAME]) | |
870 | return -EINVAL; | |
871 | ||
872 | bearer = nla_data(attrs[TIPC_NLA_BEARER_NAME]); | |
873 | ||
874 | if (attrs[TIPC_NLA_BEARER_DOMAIN]) | |
875 | domain = nla_get_u32(attrs[TIPC_NLA_BEARER_DOMAIN]); | |
876 | ||
877 | if (attrs[TIPC_NLA_BEARER_PROP]) { | |
878 | struct nlattr *props[TIPC_NLA_PROP_MAX + 1]; | |
879 | ||
880 | err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_BEARER_PROP], | |
881 | props); | |
882 | if (err) | |
883 | return err; | |
884 | ||
885 | if (props[TIPC_NLA_PROP_PRIO]) | |
886 | prio = nla_get_u32(props[TIPC_NLA_PROP_PRIO]); | |
887 | } | |
888 | ||
889 | rtnl_lock(); | |
d0f91938 | 890 | err = tipc_enable_bearer(net, bearer, domain, prio, attrs); |
0655f6a8 RA |
891 | if (err) { |
892 | rtnl_unlock(); | |
893 | return err; | |
894 | } | |
895 | rtnl_unlock(); | |
896 | ||
897 | return 0; | |
898 | } | |
315c00bc RA |
899 | |
900 | int tipc_nl_bearer_set(struct sk_buff *skb, struct genl_info *info) | |
901 | { | |
902 | int err; | |
903 | char *name; | |
904 | struct tipc_bearer *b; | |
905 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
c3d6fb85 | 906 | struct net *net = sock_net(skb->sk); |
315c00bc RA |
907 | |
908 | if (!info->attrs[TIPC_NLA_BEARER]) | |
909 | return -EINVAL; | |
910 | ||
911 | err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX, | |
912 | info->attrs[TIPC_NLA_BEARER], | |
913 | tipc_nl_bearer_policy); | |
914 | if (err) | |
915 | return err; | |
916 | ||
917 | if (!attrs[TIPC_NLA_BEARER_NAME]) | |
918 | return -EINVAL; | |
919 | name = nla_data(attrs[TIPC_NLA_BEARER_NAME]); | |
920 | ||
921 | rtnl_lock(); | |
7f9f95d9 | 922 | b = tipc_bearer_find(net, name); |
315c00bc RA |
923 | if (!b) { |
924 | rtnl_unlock(); | |
925 | return -EINVAL; | |
926 | } | |
927 | ||
928 | if (attrs[TIPC_NLA_BEARER_PROP]) { | |
929 | struct nlattr *props[TIPC_NLA_PROP_MAX + 1]; | |
930 | ||
931 | err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_BEARER_PROP], | |
932 | props); | |
933 | if (err) { | |
934 | rtnl_unlock(); | |
935 | return err; | |
936 | } | |
937 | ||
938 | if (props[TIPC_NLA_PROP_TOL]) | |
939 | b->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]); | |
940 | if (props[TIPC_NLA_PROP_PRIO]) | |
941 | b->priority = nla_get_u32(props[TIPC_NLA_PROP_PRIO]); | |
942 | if (props[TIPC_NLA_PROP_WIN]) | |
943 | b->window = nla_get_u32(props[TIPC_NLA_PROP_WIN]); | |
944 | } | |
945 | rtnl_unlock(); | |
946 | ||
947 | return 0; | |
948 | } | |
46f15c67 | 949 | |
d8182804 | 950 | static int __tipc_nl_add_media(struct tipc_nl_msg *msg, |
f2f67390 | 951 | struct tipc_media *media, int nlflags) |
46f15c67 RA |
952 | { |
953 | void *hdr; | |
954 | struct nlattr *attrs; | |
955 | struct nlattr *prop; | |
956 | ||
bfb3e5dd | 957 | hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family, |
f2f67390 | 958 | nlflags, TIPC_NL_MEDIA_GET); |
46f15c67 RA |
959 | if (!hdr) |
960 | return -EMSGSIZE; | |
961 | ||
962 | attrs = nla_nest_start(msg->skb, TIPC_NLA_MEDIA); | |
963 | if (!attrs) | |
964 | goto msg_full; | |
965 | ||
966 | if (nla_put_string(msg->skb, TIPC_NLA_MEDIA_NAME, media->name)) | |
967 | goto attr_msg_full; | |
968 | ||
969 | prop = nla_nest_start(msg->skb, TIPC_NLA_MEDIA_PROP); | |
970 | if (!prop) | |
971 | goto prop_msg_full; | |
972 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, media->priority)) | |
973 | goto prop_msg_full; | |
974 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, media->tolerance)) | |
975 | goto prop_msg_full; | |
976 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, media->window)) | |
977 | goto prop_msg_full; | |
978 | ||
979 | nla_nest_end(msg->skb, prop); | |
980 | nla_nest_end(msg->skb, attrs); | |
981 | genlmsg_end(msg->skb, hdr); | |
982 | ||
983 | return 0; | |
984 | ||
985 | prop_msg_full: | |
986 | nla_nest_cancel(msg->skb, prop); | |
987 | attr_msg_full: | |
988 | nla_nest_cancel(msg->skb, attrs); | |
989 | msg_full: | |
990 | genlmsg_cancel(msg->skb, hdr); | |
991 | ||
992 | return -EMSGSIZE; | |
993 | } | |
994 | ||
995 | int tipc_nl_media_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
996 | { | |
997 | int err; | |
998 | int i = cb->args[0]; | |
999 | struct tipc_nl_msg msg; | |
1000 | ||
1001 | if (i == MAX_MEDIA) | |
1002 | return 0; | |
1003 | ||
1004 | msg.skb = skb; | |
1005 | msg.portid = NETLINK_CB(cb->skb).portid; | |
1006 | msg.seq = cb->nlh->nlmsg_seq; | |
1007 | ||
1008 | rtnl_lock(); | |
1009 | for (; media_info_array[i] != NULL; i++) { | |
f2f67390 ND |
1010 | err = __tipc_nl_add_media(&msg, media_info_array[i], |
1011 | NLM_F_MULTI); | |
46f15c67 RA |
1012 | if (err) |
1013 | break; | |
1014 | } | |
1015 | rtnl_unlock(); | |
1016 | ||
1017 | cb->args[0] = i; | |
1018 | return skb->len; | |
1019 | } | |
1020 | ||
1021 | int tipc_nl_media_get(struct sk_buff *skb, struct genl_info *info) | |
1022 | { | |
1023 | int err; | |
1024 | char *name; | |
1025 | struct tipc_nl_msg msg; | |
1026 | struct tipc_media *media; | |
1027 | struct sk_buff *rep; | |
1028 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
1029 | ||
1030 | if (!info->attrs[TIPC_NLA_MEDIA]) | |
1031 | return -EINVAL; | |
1032 | ||
1033 | err = nla_parse_nested(attrs, TIPC_NLA_MEDIA_MAX, | |
1034 | info->attrs[TIPC_NLA_MEDIA], | |
1035 | tipc_nl_media_policy); | |
1036 | if (err) | |
1037 | return err; | |
1038 | ||
1039 | if (!attrs[TIPC_NLA_MEDIA_NAME]) | |
1040 | return -EINVAL; | |
1041 | name = nla_data(attrs[TIPC_NLA_MEDIA_NAME]); | |
1042 | ||
1043 | rep = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); | |
1044 | if (!rep) | |
1045 | return -ENOMEM; | |
1046 | ||
1047 | msg.skb = rep; | |
1048 | msg.portid = info->snd_portid; | |
1049 | msg.seq = info->snd_seq; | |
1050 | ||
1051 | rtnl_lock(); | |
1052 | media = tipc_media_find(name); | |
1053 | if (!media) { | |
1054 | err = -EINVAL; | |
1055 | goto err_out; | |
1056 | } | |
1057 | ||
f2f67390 | 1058 | err = __tipc_nl_add_media(&msg, media, 0); |
46f15c67 RA |
1059 | if (err) |
1060 | goto err_out; | |
1061 | rtnl_unlock(); | |
1062 | ||
1063 | return genlmsg_reply(rep, info); | |
1064 | err_out: | |
1065 | rtnl_unlock(); | |
1066 | nlmsg_free(rep); | |
1067 | ||
1068 | return err; | |
1069 | } | |
1e55417d RA |
1070 | |
1071 | int tipc_nl_media_set(struct sk_buff *skb, struct genl_info *info) | |
1072 | { | |
1073 | int err; | |
1074 | char *name; | |
1075 | struct tipc_media *m; | |
1076 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
1077 | ||
1078 | if (!info->attrs[TIPC_NLA_MEDIA]) | |
1079 | return -EINVAL; | |
1080 | ||
1081 | err = nla_parse_nested(attrs, TIPC_NLA_MEDIA_MAX, | |
1082 | info->attrs[TIPC_NLA_MEDIA], | |
1083 | tipc_nl_media_policy); | |
1084 | ||
1085 | if (!attrs[TIPC_NLA_MEDIA_NAME]) | |
1086 | return -EINVAL; | |
1087 | name = nla_data(attrs[TIPC_NLA_MEDIA_NAME]); | |
1088 | ||
1089 | rtnl_lock(); | |
1090 | m = tipc_media_find(name); | |
1091 | if (!m) { | |
1092 | rtnl_unlock(); | |
1093 | return -EINVAL; | |
1094 | } | |
1095 | ||
1096 | if (attrs[TIPC_NLA_MEDIA_PROP]) { | |
1097 | struct nlattr *props[TIPC_NLA_PROP_MAX + 1]; | |
1098 | ||
1099 | err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_MEDIA_PROP], | |
1100 | props); | |
1101 | if (err) { | |
1102 | rtnl_unlock(); | |
1103 | return err; | |
1104 | } | |
1105 | ||
1106 | if (props[TIPC_NLA_PROP_TOL]) | |
1107 | m->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]); | |
1108 | if (props[TIPC_NLA_PROP_PRIO]) | |
1109 | m->priority = nla_get_u32(props[TIPC_NLA_PROP_PRIO]); | |
1110 | if (props[TIPC_NLA_PROP_WIN]) | |
1111 | m->window = nla_get_u32(props[TIPC_NLA_PROP_WIN]); | |
1112 | } | |
1113 | rtnl_unlock(); | |
1114 | ||
1115 | return 0; | |
1116 | } |